mojohaus
Only prefix program output with thread name when running with multiple threads
This is a follow-up to some review comments in Pull Request #153 (for Issue #152) after it had been merged.
Attaching the owning thread name to program output as a prefix will only occur if the Maven session is running with 2 or more threads (i.e. session.isParallel()). Otherwise no log prefix is attached.
Examples Below is sample output of two modules in a reactor with the following plugin execution configured:
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>3.0.1-SNAPSHOT</version>
<executions>
<execution>
<id>test</id>
<phase>compile</phase>
<goals>
<goal>exec</goal>
</goals>
<configuration>
<executable>bash</executable>
<arguments>
<argument>-c</argument>
<argument><![CDATA[
for i in {1..100}
do
echo "${project.artifactId} - $i"
done
]]></argument>
</arguments>
</configuration>
</execution>
</executions>
</plugin>
Example 1. Default behavior, single-thread: mvn clean install
module1 - 56
module1 - 57
...
module2 - 61
module2 - 62
...
Example 2. Default behavior, multi-thread: mvn clean install -T 2
...
module1 - 53
2m o-d u8l0e
module2 - 81
module2 - 812
m-o d5u4l
module1 - 55
...
Example 3. With Maven Logger option enabled, single-thread: mvn clean install -Dexec.useMavenLogger=true
13:22:22.491 [Exec Stream Pumper] [INFO] module1 - 56
13:22:22.492 [Exec Stream Pumper] [INFO] module1 - 57
...
13:22:22.692 [Exec Stream Pumper] [INFO] module2 - 61
13:22:22.692 [Exec Stream Pumper] [INFO] module2 - 62
Example 4. With Maven Logger option enabled, multi-thread: mvn clean install -T 2 -Dexec.useMavenLogger=true
...
13:23:43.808 [Exec Stream Pumper] [INFO] [BuilderThread 1] module1 - 53
13:23:43.808 [Exec Stream Pumper] [INFO] [BuilderThread 2] module2 - 58
13:23:43.808 [Exec Stream Pumper] [INFO] [BuilderThread 1] module1 - 54
13:23:43.808 [Exec Stream Pumper] [INFO] [BuilderThread 2] module2 - 59
...
NOTE: In these last 2 examples, My Maven installation is configured to always print timestamp and thread name before Maven log output.
