text:
|Publication number
|Publication type
|Application number
|Publication date
|Sep 2, 2008
|Filing date
|Oct 15, 2004
|Priority date
|Oct 16, 2003
|Fee status
|Publication number
|Jeff Taylor, Rachel Wang, Li Zheng
|Original Assignee
|Informatica Corporation
|Export Citation
|BiBTeX, EndNote, RefMan
|Patent Citations (107), Non-Patent Citations (52), Referenced by (64), Classifications (9), Legal Events (5)
|External Links: USPTO, USPTO Assignment, Espacenet
This application claims the benefit of U.S. provisional patent application Ser. No. 60/512,310, filed Oct. 16, 2003, entitled "Querying, Versioning, and Dynamic Deployment of Database Objects," which is hereby incorporated by reference.
This invention relates to database management and data processing. Specifically, this invention provides methods for tracking, querying, and dynamically deploying database objects based on a database object versioning system.
The methods and systems of this invention may be advantageously applied in conjunction with various database management systems (DBMS) such as relational DBMS or object DBMS. They can facilitate data retrieval, data update, and database application development. Particularly in an enterprise setting, the methods and systems disclosed herein are useful for Extract, Transformation, and Load (ETL), data warehousing, enterprise application integration (EAI), and enterprise information integration (EII).
Effective integration and utilization of information is key to today's research institutions and business enterprises. A variety of tools have been made available publicly or commercially for building, deploying, and managing enterprise data warehouses and other data integration projects. Such tools enable the transformation of data from disparate enterprise systems and sources into useful information to support research undertakings and business initiatives. See, e.g., Informatica� PowerCenter� and Informatica� PowerCenterRT™ (http://www.informatica.com/products/powercenter/default.htm). The real time data integration software such as Informatica� PowerCenterRT™ may be particularly useful in combining transactional data generated by, e.g., online systems and EAI applications, with historical information stored in enterprise databases or warehouses.
However, to manage and track dynamic changes of data, coordinate and control deployment of data objects to one or more enterprise databases, data marts, or warehouses, and support consistent user access to updated versions of data objects, there remains a need for a methodology for effective identification and management of changes of database objects in an enterprise information environment.
In various embodiments, the present invention provides methods and systems for creating versions of database objects and for tracking, querying, retrieving, and deploying such versioned database objects in enterprise databases, data marts, or data warehouses. The database objects may be interrelated and may reference one another according to their accurate versions.
In a further embodiment, the present invention provides methods for versioning both complex objects and other objects referenced by complex objects. When a complex object that references a non-reusable object is checked out for modification, the non-reusable object is not automatically checked out. After the complex object is modified and checked in, the complex object's version number increments, but the version number of the unmodified non-reusable object remains the same. In contrast, when a user attempts to modify the referenced non-reusable object along with the complex object, the non-reusable object is then checked out. After the complex object and the non-reusable object are modified and checked in, the version numbers of each are incremented, and the reference of the complex object to the non-reusable object is updated to be the incremented version number of the non-reusable object. Thus, a benefit of these methods is that storage space is saved by not creating unnecessary new versions of objects that have not been modified.
In some embodiments, cached copies of objects are used in other applications, but these copies may become outdated by new versions. When a new version of one of these objects is checked in, notification of the incremented version number of the object is sent to the other applications. A benefit of this method is improved synchronization across applications.
In a further embodiment, users can query for versioned objects based on one or more criteria. By default, the query results return only the latest version of the objects satisfying the criteria. When a query contains an object state criterion, then the query results include all versions of all objects that satisfy the criteria. This improves the user's ability to tailor the result set to include only versions of interest to the user.
In another embodiment, the present invention provides methods for fetching a version of an object that is referenced by another object. If the referenced object is reusable, the version of the referenced object that is fetched is the version corresponding to the version number of the referenced object that is included in the referring object. If the referenced object is non-reusable, then the version of the referenced object that is fetched depends on whether version of the referring object is the latest version. If the version of the referring object is the latest version, then the latest version of the referenced object is fetched. If the version of the referring object is not the latest version, then the version of the referring object that has the most recent check in time that is prior to the referring object's check out time is fetched. These methods are useful to ensure that the appropriate version of the referenced object is fetched for a given version of the referring object as new versions of both the referring and referenced object are created.
In a further embodiment, the present invention provides a method for dynamically deploying a set of objects. A plurality of objects is stored in a dynamic deployment group in a source repository. At least one of the objects in the dynamic deployment group is a query object that stores a query for selecting objects for inclusion in the deployment group. When a request is made to deploy the deployment group, the query is executed and a set of objects satisfying the query is returned. For each selected object, the version of the object to deploy is determined and associated with the deployment group. Then, the objects of the deployment group are deployed in the target repository. Thus, in a database with versioned objects, the versions of objects to be deployed can be dynamically determined by executing a query when deployment is requested, eliminating a need to add objects to the deployment group incrementally prior to requesting the deployment of the group.
In some embodiments, to determine which version of an object to deploy, the query stored in the query object includes a condition for the object that indicates that it is ready to deploy. In these cases, the version of each object that is selected is the one indicated as being ready to deploy. Otherwise, the current version of the object is selected. This ability to pre-mark versions of objects as ready for deployment simplifies the process for requesting and executing a deployment.
The figures depict a preferred embodiment of the present invention for purposes of illustration only. One skilled in the art will readily recognize from the following discussion that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the invention described herein.
I. Versioning
According to one embodiment, the present invention provides a database versioning system that allows check out and check in of objects as well as viewing the history of all changes to an object in the repository. Examples of data or database objects in a database repository include Definition, Target Definition, Transformation, Mapping, Session, and Workflow. Such a database repository may support ETL, EAI, or EII operations in various embodiments.
Check Out and Check in
Users are required to check out an object before they can modify a versioned object. Before an object can be modified, a Write-Intent lock must be obtained. If the lock cannot be obtained, the user is not allowed to modify the object. Once an object has been changed, the object must be checked in to make the changes visible to all users in the repository. Thus, to publish the changes they have just made, users will be required to check in their changes.
View History
The object view history command is used to view the history of all changes to a specific object in the repository. See, e.g.,
From the view history window, the user can select one or more versions of an object. The following commands are available: compare two versions of an object; export to XML file; apply Label; add to deployment group; and purge version.
Labels are objects that can be associated or applied to any other versioned object in the repository. They can be used to mark objects or associate a group of objects. The user can also view all objects that have a specified Label applied to them. The labeling functionality is split into two parts: Label objects and applying or associating Labels to other versioned objects.
The Label object has the following properties: label name; label type—one per version or one per object; comments; user that created the Label object; and creation date. Labels are global objects within a repository and can be used across folders. Users can access Labels, Deployment Groups and Queries via a global objects menu. Selecting the global objects Labels menu item will display the label browser to the user. Users can view, create, edit, and delete Label objects from this browser. These functions may require privilege verification that the user has the permission level needed to execute the function. Permissions may be set for each Label individually.
The view objects command will display a list of the properties of objects. This list contains all the object versions that currently have the selected Label. Internally, this will execute a predefined query to list all the objects that have this Label. The results are displayed in a query results window.
Deleting a Label object will permanently delete the Label object. This also permanently deletes all history of the Label object and any associations it has with other versioned objects. The versioned objects themselves are not deleted or modified in any way.
Depending on the user's permissions on a particular Label, the edit and delete buttons in the label browser will be enabled or disabled. Choosing the edit or add button on the browser will bring up the label editor. Creating a Label object will prompt the user for the Label object's name and comments. The Label's name must be unique in the repository. The following label types are available: one per version—user can label each version of the object with the same Label; one per object—user can have one Label per object only. A user can lock the Label so nobody can modify it.
Labels can be applied to all versioned objects in the repository. Applying Labels can be done in many places throughout the client tools such as the history browser of an object and the query results window. The "Apply Label" menu item brings up the label browser. Users can select a particular Label in the browser and select the apply button to apply the Label to the object. Referring now to
Multiple versions of the same object cannot contain the same Label if the Label is of the type one per object, such as the "Ready to Deploy" Label. That is, if version 5 of a Mapping has the Label "Ready to Deploy" and the user wants to apply the same Label to version 6 of the Mapping, the Label will have to be moved from version 5 to 6. If the user does not do this, the client tools should display an appropriate message.
A "Remove Label" menu item will be available wherever "Apply Label" is available to users. On invoking this menu item, once again the labels browser will be displayed to the user. However, now only those Labels that have been applied to this object/version will be enabled. The remaining Labels in the browser will be disabled for selection. Removing a Label like this will only remove the Label reference, the object/version and the Label object itself will not be deleted.
Applying a Label to an object will also allow a comment to be specified. The action of labeling an object is an event that is recorded in the repository in a Label log. The information saved includes the Label that was applied, the object(s) it was applied to, the user that applied the Label, timestamp information, and any comments entered by the user. This information is not deleted or altered when the same Label is applied to a different version of the object. From the label browser, users can select a particular Label and view the logs associated with this Label.
Version Numbers
Version numbers apply only to objects, and all versioned objects will have a version number. The version number is unique with an object. The version number has an initial value of 1 when the object is first created. Modifying an object (checking in an object) will always increment the version number automatically. The user cannot specify the version number's value at any time. For all practical purposes, this is a read only value.
Each object that is versioned has a status. The information stored for the status is defined below:
Deleted refers to an object that has been logically deleted, but not physically deleted in the repository. Objects marked as deleted can be recovered by querying to find objects with a status of deleted.
Latest refers to the most recent version of an object. Exactly one version of an object can and must be the latest.
Older refers to all non-latest versions of an object.
Locked refers to a state in which no user, including the Super User, is allowed to modify the object. All objects are normally in the "Active" state. To prevent anyone from modifying an object, the object's state can be changed to "Frozen." A frozen object cannot be checked out or changed.
New refers to an object that has been saved, but it has not been checked in yet.
Visible refers to the one version of an object to display to the user. At most one version of the object can be visible. Although any version can be made visible, the usual case is for the latest version to be visible. If an object is deleted, then no versions are visible because no versions of deleted objects should be displayed to the user.
Before an object can be modified, it must be checked out. Only one version of an object may be checked out at a time. To check in a new version of an object, the new version of the object is saved, the new version's status is updated to indicate it is visible, and the previously visible version of the object is updated to say that it is no longer visible. The time that an object was checked in is stored in each of the main object tables in UTC format.
Object References
Some types of objects can have references to other objects. For example, a Mapping has a reference to a Source Definition. That is, the Mapping is "using" the Source Definition. Objects that reference other objects are considered complex objects. Objects that do not reference other objects are considered simple objects.
Some types of objects are reusable. For example, one Source Definition can be reused in an unlimited number of Mappings because all Source Definitions are reusable. That is, the Mapping is "using" the Source Definition, but the Mapping does not "own" or have any exclusive rights to that Source Definition because the Source Definition is reusable.
Certain types of objects can also be non-reusable. That is, non-reusable objects are used by only one other object. For example, a non-reusable Transformation is used in only one Mapping. That is, the Mapping is "using" the Transformation, and the Mapping "owns" and has exclusive rights to that Transformation. A non-reusable object may be made into a reusable object, but in one embodiment, this is an irreversible operation. Once saved to the repository, this change is permanent and visible to all users.
A primary reference is a reference from one object to another that results in the referenced object being fetched. A secondary reference is a reference from one object to another that does not result in the referenced object being fetched. Instead, the referenced object should have already been fetched due to a primary reference. When a primary reference is encountered, the referenced object must be fetched. To fetch the object, the version of the object to fetch must be determined. The following rules exist, in this order of precedence:
Non-reusable objects cannot be saved or checked in independently of their parent object. To save space in the repository and to avoid creating new versions of all non-reusable objects, the system only saves those non-reusable objects that were actually changed by the user. As a result, the non-reusable object's version number will not necessarily be the same as the complex object's version number. Thus, the system will store the non-reusable object's version number along with any primary reference to that non-reusable object.
Clients will generally fetch the latest version of the repository objects for all editing purposes. Only for special purposes like comparing an object with its older version will clients fetch the older versions of the object. When fetching the latest version of a complex object, the system fetches the latest version of any referenced object. When fetching a prior version of the complex object, the system must determine which version of the referenced objects to fetch. The ref_time of the complex object informs the system not to use any version of a referenced object newer than the ref_time. To determine this, the system compares the complex object's ref_time to the check in time of the versions of the referenced object. The version of the referenced object that will be fetched is the most recent version that has a check in time that is prior to the ref_time of the complex object.
Versioning of Simple Reusable Objects
Versioning may be applied to simple reusable objects in one embodiment. Each object may have multiple versions in the repository. For example, for a simple object such as a Source Definition, creating the Source Definition results in the database system assigning it a version number of 1. The view of the History of the Source Definition after creating the Source Definition is shown in
Since a Source Definition is a simple object (it has no references to other objects), a complete copy of the object may be stored in the data repository for each version. In this example, two versions of the Source Definition have been created; therefore, two complete copies of this Source Definition are stored in the data repository. No "deltas" or differences between the versions are stored in the repository. Also recorded in the data repository is some additional versioning-related information for each version of the Source Definition, including, e.g., last saved time (the time when the Source Definition was most recently saved), check in time (the time when the Source Definition was checked in), and check out time (the time when version 1 was checked out to create version 2). Checking out version 1 will eventually result in the check in of version 2.
Versioning of Complex Objects
Versioning may be applied to complex data objects as well. For example, for a complex reusable object such as a Mapping, versioning and referencing to other objects operate in a different manner than for a simple object. Mappings can have references to many non-reusable objects, including, e.g., Transformations. Checking out and checking in a Mapping works the same way as it does for the Source Definition described supra. Checking out the Mapping does not check out any non-reusable objects in the Mapping. A non-reusable object in the Mapping will be automatically checked out if and when it is modified. Checking in a Mapping will also automatically check in all non-reusable objects used in that Mapping.
For example, referring to
After the Mapping is created, repeatedly modified, and checked in and out a few times, a view of the History of the Mapping shows three versions (501) of the Mapping (
Suppose a fourth version of the Mapping is created and the Source Qualifier Transformation in this fourth version of the Mapping is also modified. The view of the History for the Source Qualifier Transformation shows that there are now two versions (701) of the Source Qualifier Transformation (
Therefore, according to one embodiment, references to a non-reusable object always contain the specific version number of the non-reusable object that is being referred to. In the example above, versions 1 through 3 of the Mapping will record in the repository that they are specifically using version 1 of the non-reusable Source Qualifier Transformation. Version 4 of the Mapping will record in the repository that it is specifically using version 2 of the non-reusable Source Qualifier Transformation.
In yet another embodiment, versioning may be applied to complex reusable objects that reference other reusable objects. For example, suppose the Source Definition and the Mapping are checked out. As described above, the Mapping is a complex reusable object that contains a reference to the reusable Source Definition.
In the above example, although not shown in the View History of
In sum, versioning of simple or complex objects in a database may be carried out using the methods and systems of this invention. These methods and systems may be applied in connection with a relational database, an object database, or other suitable databases in various embodiments.
Updating Versioning Information for Cache Copies
In still another embodiment, the present invention also provides a method for automatically updating the versioning information for cache copies of an object that is used by a client application, whenever the object is checked in by another user or another application (and presumably modified hence a new version created). This capacity can be referred to as active metadata. It is particularly useful in interacting with database applications (client or user applications) that support object caching. That is, these applications store copies of the objects in their own memory, which presents a synchronization challenge for the enterprise database systems. If the user checks in an object from one client application, versions of that object that have been cached in memory in other client applications become stale. According to this embodiment, an object sends a notification to all other client applications using the active metadata capabilities. When a client application receives this notification, it updates its in-memory cache with the object's updated version number and other versioning-related information.
II. Querying
Queries are global objects that are persisted in the repository. Queries provide a mechanism to search versioned repository objects. This feature is available in three client tools: Designer which is used to create Mappings and all objects that might be used by Mappings such as Sources, Targets, and Transformations; Workflow Manager which is used to create objects pertaining to workflows, such as various tasks, schedulers, connections, and the like; and Repository Manager which enables users to manager all types of repository objects in a central place, such as check in, purge, deploy, and the like. Users in the Designer can query only designer objects, workflow manager objects in the Workflow Manager, and all supported objects in the Repository Manager. Similar to the custom tools menu in the client tools, to which users can add customized menu items in order to launch frequently used applications, users may add menu items to launch frequently used Queries from the client tools Designer, Repository Manager and Workflow Manager.
Query Permissions
Queries are secured objects, which means a user needs proper permissions to create, read, edit, or execute queries. In conjunction, public and private privileges also apply. Public queries are visible to all users while private queries are visible to the owner only. Users can change queries to public or private using the query browser on the clients. A list of available permissions and their meanings are specified here:
Execute permission: Users can select the particular permission in the query browser and execute it and view the query. Users with just execute permissions on the given query will not be able to view the query definition. This way, the user can use the query, but has no access to the business logic involved.
Read permission: With this permission, users can execute the query and also view the business logic of the query. However, they cannot modify the query and save it to the repository.
Write permission: This is the highest permission users can have on any secured object. This gives the user full control over the object. Users will be able to execute the query, view the business logic and update it.
Query Editor
Queries contain a list of parameters that define the query, where each search condition specifies one rule for results. It is valid to have a query with a single condition. When the query contains multiple query conditions, these conditions will be joined together in a logical and or or condition. Referring to
Each query condition will have three main components, namely: query parameter (1002) that is being searched, query operator (1003) that defines the search, and values (1004) that are being searched for. The set of parameters (1002) to choose from is predefined and has been listed below. The list of operators (1003) available depends on the parameter (1002) specified by the user. Depending on the parameter (1002) and the operator (1003) chosen by the user, values (1004) can either be keyed-in by the user or can be chosen from a list of available choices. Number of inputs accepted for values (1004) will also depend on the parameter (1002) and operator (1003) chosen by the user. For example, if the user chooses Parameter "object type" and operator "equal to", only one input will be accepted. However with the same parameter, if the user chooses operator "is in" user can select multiple values from the list of object types. If the user chooses Parameter "object name" operator "equal to", one value will be accepted, for operator "is in" multiple values will be accepted. The difference between the first and second examples is that in the first example, the query editor (1001) will provide a set of values to choose from and in the second example, the user can type in values.
Each query contains one or more conditions, based on which the search is performed. The order of these conditions is important, both for display and execution purposes. The order in which the query is executed and displayed is the order in which the query conditions are listed in the query editor (1001).
Based on user-defined search conditions, the client constructs a Query object and sends it to the Repagent to execute. The Repagent provides repository service for repository clients. It sits in between the various clients and the actual repository database, thus hiding the heterogeneous nature of different types of databases from the clients. The Repagent accepts client requests, executes the requests on behalf the client, and finally sends the reply back to the client. From the Query object, the Repagent dynamically builds the necessary SQL queries, executes to populate result set, filters out incorrect entries, and returns the query results to the client. By default, query results return either the latest version or checkout version, but not both. However, when certain search conditions are present, such as object state, labels, deployment history, last saved time, and modifying user, then the search returns all versions of an object by default. Of course, these rules for default versions are voided when the object state search condition is present, in which case the user can specify a combination of version status and visible states, which allows the user to access particular versions of objects meeting the search criteria. The search criteria are listed in greater detail below:
Object type. find objects with selected object type(s). Search results include all supported object types by default when this condition is not present within a query.
Folders: find objects within selected folder(s). The displayed folder list contains only folders the current user has read permissions to, not the query's original creator or owner, but the current editing or executing user. Search results include all objects within all folders in the repository, which are readable by the current user by default when this condition is not defined within a query.
Labels: find object versions with applied Label(s). The displayed Label list contains all Labels in the repository. When searching for objects with Labels not equal to a certain value, the query results contain all objects that do not have the Label of the certain value as well as objects without any Labels applied.
Modifying users: find object versions that are modified by the selected user(s). The displayed user list contains all users in the repository, but not deleted users. If a version in the results was modified by a deleted user, the user name will be displayed as "unknown". In any case, results only examine checkouts belonging to the query's executing user, because checkouts of other users are not visible to the current user.
Deployment History: find objects that were deployed as part of a deployment group with the user-specified time. Objects that were part of a folder deployment or were not created from deployment are not included in the query results if this search condition is present.
LastSavedTime: find object versions that were saved within the user specified time.
Object State: find object versions with the selected object state(s). Displayed states include "Active" "Frozen, allow deploy to replace," "Frozen, not allow deploy to replace," "Invisible," "Visible," and "Checkout".
Is reusable: find objects that are/are not reusable. By default only returns reusable objects.
Object name: find objects with names matching user-specified string(s).
Object comments: find objects with object comments, no check-in comment, matching user-specified string(s).
Business name: find objects with business names matching user-specified strings.
Metadata extensions: find objects with metadata extension values with matching user inputs. Users can search by any or all of domain(s), metadata extension name(s), and metadata extension value(s).
Is referred: find objects that are use/unused by other repository objects. For example, if a source is used inside a Mapping, this source is considered referred.
Find X dependency for Y: find object dependency relationships. These dependencies can be direct or reverse. Direct dependency searches for all objects in the repository that use a given object. Reverse dependency is to find all the objects used by the given objects.
Query Results
Users can execute Queries from the query browser or from the query editor (1001). Executing a Query brings up the query results. The following information is available for each item in the result set: object type, object name, folder name, is checked out, is reusable, dependent objects, saved from (host name), object version number, last saved time/check in time, user that check-in this version of the object, check in comments, and all the Labels applied to the selected version of the object. Users can view the properties of this version of an object returned in the results, view properties of the object, view object change history, compare with previous version, apply a Label, export object using XL Object I/E, save results to a file, purge a version, or create or add to a Deployment Group. Although Query objects are persisted in the repository, query results are not.
The query results dialog supports multiple selections. This allows the user to apply Labels to multiple objects at once, add multiple objects to a Deployment Group, and the like.
III. Deployment
Incremental Deployment
Referring to
Referring to
Referring to
A deployment history can also be displayed. The deployment history dialog has the following columns: date/time; user; deploy group name; host; source repository; target repository; and comment. A user can get details of each of the deployments by double clicking on the appropriate item. The following detailed information will be presented: object name; object type (Workflow, Mapping, etc); folder name (source); version number (source); folder name (target); version number (target). For nested objects, the full path starting from the upper level is displayed. For example, if non-reusable object w1 was deployed from Mapping m1 the name will be "m1/w1."
With versioning, deployment is categorized into the following five cases of bulk copying:
Case A: From the end user's perspective, the newly created folder in the target repository should be an exact duplicate of the original folder including all shortcut references. Note that objects that were marked as deleted in the source folder will not be deployed, because end users would not be able to see these objects. Objects checked out in the source folder will not be deployed either, because not all users can see them. With these exceptions, all versions of all versioned objects are copied to the target repository.
Case B: Similar to case A, except only the latest version of versioned objects are copied. As the newest version is the only version visible to the end users, the user would perceive the two folders as identical, except when they view objects history, purge objects, or view version numbers. Thus, only the latest version information is available in the target repository. For example, when users view object history, they would see only one version, i.e., version 1.
Case C: Instead of simply truncating the folder to be replaced, the system checks the folder to determine if there is any object that has been checked out or has been locked to disallow deploy to replace. If so, then the deployment fails. As in Case B, the objects that were marked deleted or checked out in the source folder will not be deployed.
Case D: Similar to Case C, except only the latest version of the versioned objects are copied, so when users view object history for these objects, they would see only one version, i.e., version number 1.
Case E: There is a user interface as part of the Repository Manager (
Objects in deployment should not be checked out, however, if the status of an object in the deployment group is locked, the system may copy this object to the target repository as locked or unlocked depending on users' input.
If an object in the Deployment Group is marked deleted, the corresponding object in the target repository is marked deleted. On the other hand, if an object in the Deployment Group is not marked deleted, but its counterpart in the target repository is marked deleted, then the system undeletes this object in the target and then copies the object from source. For example, suppose Mapping myobj with version number n from folder srcfolder is in a Deployment Group, in order to be able to deploy this object, in the target folder targfolder:
Dynamic Deployment
In another embodiment, methods and systems for dynamic deployment of objects are provided. Dynamic deployment combines incremental deployment and querying capacities. A dynamic Deployment Group can include a Query object which selects particular objects for inclusion in the group. For example, a query is executed and the resulting list of objects is subsequently selected to be included in a Deployment Group that is incrementally deployed. Prior identification (static identification) of the object to be deployed is no longer required because the list of objects is dynamically determined by running queries. To deploy a dynamic Deployment Group, the query will be executed first, and then the results will be saved in the Deployment Groups. Now the Deployment Group will be deployed just like a regular case E type. Before deployment, appropriate locks need to be acquired.
Queries may be created to define specific types of changes to objects that the user would like to deploy. For instance, a query can be defined to find objects that are labeled as both "ready to deploy" and "approved to deploy." A query can also be defined to identify all dependencies of the desired objects so that they too can be included in the deployment. A user may direct and monitor such deployment from a command line or via a graphical user interface.
The Deployment Group information is captured in two tables. The first table contains the information for Deployment Groups created. It includes the deployment group id, name, owner information, and creation time. The second table contains relationship between the objects and a Deployment Group. It stores the information that can tell which objects are grouped under one Deployment Group.
The group deployment histories are captured in two tables. The history includes information like the object name, source or target repository, source object version number, target object version number, source folder name, and target folder name. The Repository Manager is able to display this information through the global Deployment Group interface.
Deployment Steps Implementation. The following describes the major deployment steps:
1. Version Status Check. This step is done only for cases C and D (replace folders), when versioning is enabled. In this step, the system checks that there is no object checked out or locked for replacement in the target folder. If this is not satisfied, deployment fails. For case E, the same check is postponed in later steps for efficiency and convenience, specifically, the version information will be cached in the read ID maps, while the checking is done in step fetch sequence IDs (see steps 6 and 8 below).
2. Dependency Check. In this step, the system finds dependent objects on which the source objects to be deployed depend. These objects include: plug-ins, connections, servers, local subjects, and global subjects.
3. Get User Input. User input may be received via a graphical user interface in this step. For example, the system may prompt users to indicate whether they would like to deploy workflow run logs associated with the workflow objects deployed, or if any dependency folder needs to be overridden.
4. Get Total Row Count. The system caches information received by calculating total row counts. Thus, if a particular query returns zero rows, it need not be fetched for any subsequent operations on it.
5. Read Marked Deleted Objects. This step is done for case E only. In this step, the system determines if some object in a Deployment Group has been marked deleted before the table is fetched so the system knows which rows should not be inserted in the target. This is necessary because the system does not always copy the first class versioned object type first. For example, source fields is copied before sources, so while copying source fields the system has to know which sources are marked deleted in order to not copy their fields.
6. Read ID Maps. The next step is to read ID maps of dependent local and global folders. For copy folder (cases A and B), the referenced objects ID Mappings for replacement are the only ones needed. For replace folder or deployment group (cases C, D, and E), additional steps need to be performed. If no deployment history information exists for the folder pairs, the system runs compare folders to get the objects ID Mapping information. For case E, the version numbers of all first class versioned objects in target folders need to be cached.
7. Fetch Table. In this step, repository tables are fetched from source folders.
8. Fetch Sequence IDs. In this step, the sequence ID map is examined and sequence IDs are fetched from the target repository if needed. For case E, there are additional steps. First, no new IDs are allocated for objects marked deleted in the source. This is also when the system checks if any object to be replaced had been checkout out or locked for replacement in target. If any such object is found, the system produces an error message. A name conflicts check is also executed in this step.
9. Assign ID and Version Number. The system then assigns new IDs and version number for all the rows fetched. To be able to assign new version numbers, the system needs to determine which column in a table is for version number, as well as the "parent" id and type of this version number. For cases A and C, the same version number from the source repository is used for the corresponding version in the target repository. For cases B and D, a version number 1 is used for versioned objects in the target repository. For case E, the version number read from the target repository plus 1 is used as the new version number. If the IDs are not present in the ID maps read, those IDs would have version number 1.
10. Insert Table. Then the rows fetched from source are inserted to the target folders, the is_marked column is set to one for case E, and zero for all other cases. For case E, the source rows marked deleted and the source rows whose counterparts in the target is marked deleted are skipped. For cases A and C, the same check in history as recorded in the source repository is made. For cases B, D and E, one check in history entry for each first class versioned object copied is inserted, recording the fact that deployment copied the object from a given folder in a given repository. For case E only, for all objects in the group marked deleted, the objects they will replace in the target are marked deleted. A check in history is inserted for each such object, recording the fact that deployment marked deleted the object.
11. Invalidation. After all rows to the target repository have been inserted, Mappings and Sessions are invalidated if they are associated with invalid shortcuts or invalid connections.
12. Save Deployment History and Check In. For cases A, B, C and D, the system saves the folder deployment information and ID maps information. For case E, new entries to ID maps are inserted without modifying the existing entries. Then the deployment history is logged in both the source and target repository. Then the transactions are committed in both the source and target repository. After the commit, they system checks in all versioned objects for case E by updating all the marked rows.
The present invention has been described in particular detail with respect to one possible embodiment. Those of skill in the art will appreciate that the invention may be practiced in other embodiments. First, the particular naming of the components, capitalization of terms, the attributes, data structures, or any other programming or structural aspect is not mandatory or significant, and the mechanisms that implement the invention or its features may have different names, formats, or protocols. Further, the system may be implemented via a combination of hardware and software, as described, or entirely in hardware elements. Also, the particular division of functionality between the various system components described herein is merely exemplary, and not mandatory; functions performed by a single system component may instead be performed by multiple components, and functions performed by multiple components may instead performed by a single component.
Some portions of above description present the features of the present invention in terms of algorithms and symbolic representations of operations on information. These algorithmic descriptions and representations are the means used by those skilled in the data processing arts to most effectively convey the substance of their work to others skilled in the art. These operations, while described functionally or logically, are understood to be implemented by computer programs. Furthermore, it has also proven convenient at times, to refer to these arrangements of operations as modules or by functional names, without loss of generality.
Unless specifically stated otherwise as apparent from the above discussion, it is appreciated that throughout the description, discussions utilizing terms such as "processing" or "computing" or "calculating" or "determining" or "displaying" or the like, refer to the action and processes of a computer system, or similar electronic computing device, that manipulates and transforms data represented as physical (electronic) quantities within the computer system memories or registers or other such information storage, transmission or display devices.
Certain aspects of the present invention include process steps and instructions described herein in the form of an algorithm. It should be noted that the process steps and instructions of the present invention could be embodied in software, firmware or hardware, and when embodied in software, could be downloaded to reside on and be operated from different platforms used by real time network operating systems.
The present invention also relates to an apparatus for performing the operations herein. This apparatus may be specially constructed for the required purposes, or it may comprise a general-purpose computer selectively activated or reconfigured by a computer program stored on a computer readable medium that can be accessed by the computer. Such a computer program may be stored in a computer readable storage medium, such as, but is not limited to, any type of disk including floppy disks, optical disks, CD-ROMs, magnetic-optical disks, read-only memories (ROMs), random access memories (RAMs), EPROMs, EEPROMs, magnetic or optical cards, application specific integrated circuits (ASICs), or any type of media suitable for storing electronic instructions, and each coupled to a computer system bus. Furthermore, the computers referred to in the specification may include a single processor or may be architectures employing multiple processor designs for increased computing capability.
The algorithms and operations presented herein are not inherently related to any particular computer or other apparatus. Various general-purpose systems may also be used with programs in accordance with the teachings herein, or it may prove convenient to construct more specialized apparatus to perform the required method steps. The required structure for a variety of these systems will be apparent to those of skill in the, along with equivalent variations. In addition, the present invention is not described with reference to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any references to specific languages are provided for invention of enablement and best mode of the present invention.
The present invention is well suited to a wide variety of computer network systems over numerous topologies. Within this field, the configuration and management of large networks comprise storage devices and computers that are communicatively coupled to dissimilar computers and storage devices over a network, such as the Internet.
Finally, it should be noted that the language used in the specification has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter. Accordingly, the disclosure of the present invention is intended to be illustrative, but not limiting, of the scope of the invention, which is set forth in the following claims.
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|U.S. Classification
|1/1, 717/170, 707/999.203, 707/999.003
|International Classification
|Cooperative Classification
|European Classification
|Feb 22, 2005
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