I am using Spring Integration filter to do a structural validation of the incoming payload and if the validation fails then i want to add some custom headers to the original message.  The filter code is below :  @Service("structureValidationFilter") public class StructureValidationFilter implements MessageSelector {  @Override public boolean accept(Message&lt;?&gt; message) {     // TODO Auto-generated method stub     boolean status=true;      if(message.getPayload() instanceof CFKRequestBody) {         CFKRequestBody body=(CFKRequestBody)message.getPayload();         if(!body.getInitiatingPartyId().equalsIgnoreCase("BPKV")) {             message = MutableMessageBuilder.fromMessage(message).                     setHeader("BPKV_ERROR_CODE", "Ïnvalid Initiating part id").                     setHeader("HTTP_STATUS", "400").build();              return false;            }      }     return status; }  }   But the headers are not populating in the Message. Not able to see the headers added in the next component. What am i doing wrong here.
I always thought Java uses pass-by-reference. However, I've seen a couple of blog posts (for example, ) that claim that it isn't (the blog post says that Java uses pass-by-value). I don't think I understand the distinction they're making. What is the explanation?
How does an isolated body in deep space 'know' it's rotating? We can imagine an object floating in the known universe, maximally distant from any other large mass. Maybe it has been there since coalescing after the big bang.  What physical phenomena tell it whether it is rotating relative to the rest of the universe and therefore experiencing a centrifugal (?) force.  Is it the combined gravity of all other matter? Is it 'spooky action at a distance'?  Is it because it is rotating relative to 'empty space'? Bash File Unable to locate package when new line is added When building a bash file to execute I keep getting an error after adding a new line. I have tried moving some lines around or removing some of the packages but it will results in the same error. In the file if I was to remove 3 and 4 it there will no longer be an error.   E: Unable to locate package &lt;package&gt;   The bash file looks like this   #!/usr/bin/env bash sudo apt update &amp;&amp; sudo apt install -y python3-pip build-essential python3-dev python3-setuptools gcc sshpass sudo apt-get install apt-transport-https lsb-release software-properties-common dirmngr sudo apt-get update   The output with the error  Hit:1 http://us.archive.ubuntu.com/ubuntu bionic InRelease Get:2 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]                                                   Hit:3 http://archive.ubuntu.com/ubuntu bionic InRelease                                             Get:4 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]         Get:5 http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]                                       Fetched 252 kB in 1s (189 kB/s)     Reading package lists... Done Building dependency tree        Reading state information... Done All packages are up to date. Reading package lists... Done Building dependency tree        Reading state information... Done E: Unable to locate package sshpass Reading package lists... Done Building dependency tree        Reading state information... Done E: Unable to locate package dirmngr Hit:1 http://us.archive.ubuntu.com/ubuntu bionic InRelease Get:2 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]                                                   Hit:3 http://archive.ubuntu.com/ubuntu bionic InRelease                                             Get:4 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]         Get:5 http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]                                       Fetched 252 kB in 1s (209 kB/s)     Reading package lists... Done Set title for each terminal tab in gnome-terminal using a bash script I'm using Ubuntu 16.04  I want to open multiple terminal tabs, run commands and set title. I can open multiple tabs with this command:  gnome-terminal --tab -e "command1" --tab -e "command2"   but cannot use --title option as it is not available in this version.   I know mate-terminal can do this, but I want to use gnome-terminal.   I've applied solution posted  and it worked but when i run  gnome-terminal --tab -e "bash -c 'set-title 99;ping 192.168.7.99'"   It shows:  bash: set-title: command not found PING 192.168.7.99 (192.168.7.99) 56(84) bytes of data. 64 bytes from 192.168.7.99: icmp_seq=1 ttl=128 time=0.425 ms 64 bytes from 192.168.7.99: icmp_seq=2 ttl=128 time=0.353 ms 64 bytes from 192.168.7.99: icmp_seq=3 ttl=128 time=0.335 ms   I also applied   I've also read this post  but the accepted answer did not solve my issue in 16.04 os or gnome-terminal version 3.18.3 and other solution provides to use other terminal xterm and I want to use gnome-terminal. If I change the password for the root user is that going to automatically change the password for the user account?   I found this link for root:    How do I change the user account password? launch app, capture stdout and stderr in c++ I am working on a racing game in Unity3d and I have to show the rank as the winners touch the winning point.  As the winners reach at the winning point the image of the winner number should pop up for 1-2 seconds that is it.  How do I do it? Can anyone sort out this problem? Any help would be appreciated.  Thanks in advance :) Movie: Creature crawls out of its current hosts mouth into next hosts mouth help me to find a volume of the ring shaped solid A cylindrical drill with radius 5 is used to bore a hole through the center of a sphere of radius 8. Find the volume of the ring shaped solid that remains.  Alright, my thing is that i did not understand how to set the integral When a 0-1-matrix with exactly two 1’s on each column and on each row is non-degenerated? [1] Can I store all the content of my previous iPhone in a new iPhone using iTunes? Can I prevent others from editing my question? edited my question,  where I specifically said that our software sending back stacktrace to one of our servers was a user-known public feature.  He then modified the title of my post, along with the entire content, making it sound like I snuck in the feature and that our application was phoning home without our users knowing.    I specifically wrote in the original post that the feature was not sneaky. He completely changed the meaning of my post. I find this to be rather unacceptable.  A few questions:   Is it possible to prevent editing of my posts? How can I retaliate? Can I file a complaint?   Can people with  do anything they want on Stack Overflow? How to iterate over arguments in a Bash script Show that a Cauchy sequence has a fast-Cauchy subsequence Can I use the Adwaita theme in Unity without installing GNOME shell? I recently installed Ubuntu 11.10 (new install). I would like to use the Adwaita theme with Unity, but it seems that it is not available in the theme selection dialog. I know I get it there after installing gnome-shell, but is there a way to use Adwaita theme for Unity without installing gnome-shell? My 3 years old doesn't tell me when he needs to use the bathroom Double dispatch in C#? I have heard/read the term but don't quite understand what it means.  When should I use this technique and how would I use it? Can anyone provide a good code sample? If a two vectors $\bf u$ and $\bf v$ in linearly independent, can their images be linearly dependent given they were transformed by a linear transformation $T$? I think not. My reasoning If the images are linearly dependent, then $c_1T({\bf u})+c_2T({\bf v})={\bf 0}$ for scalars $c_1$ and $c_2$, not both $0$. Then $c_1T({\bf u})+c_2T({\bf v})={\bf 0}$ $T(c_1{\bf u}+c_2{\bf v})=T({\bf 0})$ $c_1{\bf u}+c_2{\bf v}={\bf 0}$ Therefore, ${\bf u}$ and $\bf v$ are linearly dependent. My reservation A homework problem seems to contradict the above. Here's the problem: Let $\mathbb R^n\rightarrow\mathbb R^m$ be a linear transformation. Suppose $\{{\bf u},{\bf v}\}$ is a linearly independent set, but $\{T({\bf u}),T({\bf v}\})$ is a linearly dependent set. Show that $T({\bf x})={\bf 0}$ has a nontrivial solution. How to prove that a limit does not exist? Let $x \in \mathbb{R}$ and let $\lfloor y\rfloor$ be the largest integer less than or equal to $x$. $$ f(x) = \frac{1}{x} - \left\lfloor\frac{1}{x}\right\rfloor$$ How does one prove that the $ \lim_{x\to 0} f(x)$ does not exist by using a Epsilon Delta proof? There is a hint given that you can use a proof by contradiction. What is the relationship between ISO, aperture, and shutter speed? Where did Magister Illyrio Mopatis get the dragon eggs from?