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TrackingExecutor.java
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TrackingExecutor.java
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//
// ========================================================================
// Copyright (c) 1995 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//
package org.eclipse.jetty.util.thread;
import java.io.IOException;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.Executor;
import org.eclipse.jetty.util.annotation.ManagedAttribute;
import org.eclipse.jetty.util.annotation.ManagedObject;
import org.eclipse.jetty.util.component.Dumpable;
@ManagedObject("Tracking Executor wrapper")
class TrackingExecutor implements Executor, Dumpable
{
private final Executor _threadFactoryExecutor;
private final Set<Thread> _threads = ConcurrentHashMap.newKeySet();
private boolean _detailed;
TrackingExecutor(Executor executor, boolean detailed)
{
_threadFactoryExecutor = executor;
_detailed = detailed;
}
@Override
public void execute(Runnable task)
{
_threadFactoryExecutor.execute(() ->
{
try
{
_threads.add(Thread.currentThread());
task.run();
}
finally
{
_threads.remove(Thread.currentThread());
}
});
}
@Override
public void dump(Appendable out, String indent) throws IOException
{
Object[] threads = _threads.stream().map(DumpableThread::new).toArray();
Dumpable.dumpObjects(out, indent, _threadFactoryExecutor.toString() + " size=" + threads.length, threads);
}
public void setDetailedDump(boolean detailedDump)
{
_detailed = detailedDump;
}
@ManagedAttribute("reports additional details in the dump")
public boolean isDetailedDump()
{
return _detailed;
}
public int size()
{
return _threads.size();
}
private class DumpableThread implements Dumpable
{
private final Thread _thread;
private DumpableThread(Thread thread)
{
_thread = thread;
}
@Override
public void dump(Appendable out, String indent) throws IOException
{
if (_detailed)
{
Object[] stack = _thread.getStackTrace();
Dumpable.dumpObjects(out, indent, _thread.toString(), stack);
}
else
{
Dumpable.dumpObject(out, _thread);
}
}
}
}