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test/src/main/java/org/jvnet/hudson/test/BuildWatcher.java
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/* | ||
* The MIT License | ||
* | ||
* Copyright 2015 Jesse Glick. | ||
* | ||
* Permission is hereby granted, free of charge, to any person obtaining a copy | ||
* of this software and associated documentation files (the "Software"), to deal | ||
* in the Software without restriction, including without limitation the rights | ||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
* copies of the Software, and to permit persons to whom the Software is | ||
* furnished to do so, subject to the following conditions: | ||
* | ||
* The above copyright notice and this permission notice shall be included in | ||
* all copies or substantial portions of the Software. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
* THE SOFTWARE. | ||
*/ | ||
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package org.jvnet.hudson.test; | ||
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import hudson.Extension; | ||
import hudson.console.AnnotatedLargeText; | ||
import hudson.console.LineTransformationOutputStream; | ||
import hudson.model.Run; | ||
import hudson.model.TaskListener; | ||
import hudson.model.listeners.RunListener; | ||
import java.io.File; | ||
import java.io.FileNotFoundException; | ||
import java.io.IOException; | ||
import java.io.OutputStream; | ||
import java.io.PrintStream; | ||
import java.util.Map; | ||
import java.util.concurrent.ConcurrentHashMap; | ||
import org.junit.rules.ExternalResource; | ||
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/** | ||
* Echoes build output to standard error as it arrives. | ||
* Usage: <pre>{@code @ClassRule public static BuildWatcher buildWatcher = new BuildWatcher();}</pre> | ||
* Should work in combination with {@link JenkinsRule} or {@link RestartableJenkinsRule}. | ||
* @see JenkinsRule#waitForCompletion | ||
* @see JenkinsRule#waitForMessage | ||
* @since 1.607 | ||
*/ | ||
public final class BuildWatcher extends ExternalResource { | ||
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private static boolean active; | ||
private static final Map<File,RunningBuild> builds = new ConcurrentHashMap<File,RunningBuild>(); | ||
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private Thread thread; | ||
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@Override protected void before() throws Throwable { | ||
active = true; | ||
thread = new Thread("watching builds") { | ||
@Override public void run() { | ||
try { | ||
while (active) { | ||
for (RunningBuild build : builds.values()) { | ||
build.copy(); | ||
} | ||
Thread.sleep(50); | ||
} | ||
} catch (InterruptedException x) { | ||
// stopped | ||
} | ||
// last chance | ||
for (RunningBuild build : builds.values()) { | ||
build.copy(); | ||
} | ||
} | ||
}; | ||
thread.setDaemon(true); | ||
thread.start(); | ||
} | ||
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@Override protected void after() { | ||
active = false; | ||
thread.interrupt(); | ||
} | ||
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@Extension public static final class Listener extends RunListener<Run<?,?>> { | ||
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@Override public void onStarted(Run<?,?> r, TaskListener listener) { | ||
if (!active) { | ||
return; | ||
} | ||
RunningBuild build = new RunningBuild(r); | ||
RunningBuild orig = builds.put(r.getLogFile(), build); | ||
if (orig != null) { | ||
System.err.println(r + " was started twice?!"); | ||
} | ||
} | ||
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@Override public void onFinalized(Run<?,?> r) { | ||
if (!active) { | ||
return; | ||
} | ||
RunningBuild build = builds.remove(r.getLogFile()); | ||
if (build != null) { | ||
build.copy(); | ||
} else { | ||
System.err.println(r + " was finalized but not started?!"); | ||
} | ||
} | ||
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} | ||
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private static final class RunningBuild { | ||
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private final AnnotatedLargeText<?> log; | ||
private final OutputStream sink; | ||
private long pos; | ||
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RunningBuild(Run<?,?> r) { | ||
log = r.getLogText(); | ||
sink = new LogLinePrefixOutputFilter(System.err, "[" + r + "] "); | ||
} | ||
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synchronized void copy() { | ||
try { | ||
pos = log.writeLogTo(pos, sink); | ||
// Note that !log.isComplete() after the initial call to copy, even if the build is complete, because Run.getLogText never calls markComplete! | ||
// That is why Run.writeWholeLogTo calls getLogText repeatedly. | ||
// Even if it did call markComplete this might not work from RestartableJenkinsRule since you would have a different Run object after the restart. | ||
// Anyway we can just rely on onFinalized to let us know when to stop. | ||
} catch (FileNotFoundException x) { | ||
// build deleted or not started | ||
} catch (Exception x) { | ||
x.printStackTrace(); | ||
} | ||
} | ||
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} | ||
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// Copied from WorkflowRun. | ||
private static final class LogLinePrefixOutputFilter extends LineTransformationOutputStream { | ||
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private final PrintStream logger; | ||
private final String prefix; | ||
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LogLinePrefixOutputFilter(PrintStream logger, String prefix) { | ||
this.logger = logger; | ||
this.prefix = prefix; | ||
} | ||
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@Override protected void eol(byte[] b, int len) throws IOException { | ||
logger.append(prefix); | ||
logger.write(b, 0, len); | ||
} | ||
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} | ||
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} |
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