| package org.apache.maven.surefire.booter.spi; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| import org.apache.maven.surefire.api.util.internal.WritableBufferedByteChannel; |
| import org.apache.maven.surefire.spi.MasterProcessChannelProcessorFactory; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.security.AccessControlException; |
| import java.security.PrivilegedAction; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import static java.security.AccessController.doPrivileged; |
| import static java.util.concurrent.Executors.newScheduledThreadPool; |
| import static java.util.concurrent.TimeUnit.MILLISECONDS; |
| import static org.apache.maven.surefire.api.util.internal.DaemonThreadFactory.newDaemonThreadFactory; |
| |
| /** |
| * Default implementation of {@link MasterProcessChannelProcessorFactory}. |
| */ |
| public abstract class AbstractMasterProcessChannelProcessorFactory |
| implements MasterProcessChannelProcessorFactory |
| { |
| private static final String STREAM_FLUSHER = "surefire-forkedjvm-stream-flusher"; |
| private final ScheduledExecutorService flusher; |
| |
| public AbstractMasterProcessChannelProcessorFactory() |
| { |
| flusher = newScheduledThreadPool( 1, newDaemonThreadFactory( STREAM_FLUSHER ) ); |
| } |
| |
| protected void schedulePeriodicFlusher( int delayInMillis, final WritableBufferedByteChannel channel ) |
| { |
| final AtomicLong bufferOverflows = new AtomicLong(); |
| flusher.scheduleWithFixedDelay( new Runnable() |
| { |
| @Override |
| public void run() |
| { |
| long currentBufferOverflows = channel.countBufferOverflows(); |
| // optimization: flush the Channel only if the buffer has not overflew after last period of time |
| if ( bufferOverflows.get() == currentBufferOverflows ) |
| { |
| try |
| { |
| channel.write( ByteBuffer.allocate( 0 ) ); |
| } |
| catch ( Exception e ) |
| { |
| // cannot do anything about this I/O issue |
| } |
| } |
| else |
| { |
| bufferOverflows.set( currentBufferOverflows ); |
| } |
| } |
| }, 0L, delayInMillis, MILLISECONDS ); |
| } |
| |
| @Override |
| public void close() throws IOException |
| { |
| try |
| { |
| doPrivileged( new PrivilegedAction<Object>() |
| { |
| @Override |
| public Object run() |
| { |
| flusher.shutdown(); |
| // Do NOT call awaitTermination() due to this would unnecessarily prolong teardown |
| // time of the JVM. It is not a critical situation when the JXM exits this daemon |
| // thread because the interrupted flusher does not break any business function. |
| // All business data is already safely flushed by test events, then by sending BYE |
| // event at the exit time and finally by flushEventChannelOnExit() in ForkedBooter. |
| return null; |
| } |
| } |
| ); |
| } |
| catch ( AccessControlException e ) |
| { |
| // ignore |
| } |
| } |
| } |