diff options
Diffstat (limited to 'framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/lifecycle/internal/builder/multithreaded/ThreadOutputMuxer.java')
| -rw-r--r-- | framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/lifecycle/internal/builder/multithreaded/ThreadOutputMuxer.java | 477 |
1 files changed, 477 insertions, 0 deletions
diff --git a/framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/lifecycle/internal/builder/multithreaded/ThreadOutputMuxer.java b/framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/lifecycle/internal/builder/multithreaded/ThreadOutputMuxer.java new file mode 100644 index 00000000..8f1f4932 --- /dev/null +++ b/framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/lifecycle/internal/builder/multithreaded/ThreadOutputMuxer.java @@ -0,0 +1,477 @@ +package org.apache.maven.lifecycle.internal.builder.multithreaded; + +/* + * 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 java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.io.PrintStream; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Iterator; +import java.util.Map; +import java.util.Set; + +import org.apache.maven.lifecycle.internal.ProjectBuildList; +import org.apache.maven.lifecycle.internal.ProjectSegment; + +/** + * @since 3.0 + * @author Kristian Rosenvold + * <p/> + * NOTE: This class is not part of any public api and can be changed or deleted without prior notice. + * This class in particular may spontaneusly self-combust and be replaced by a plexus-compliant thread aware + * logger implementation at any time. + */ +@SuppressWarnings( { "SynchronizationOnLocalVariableOrMethodParameter" } ) +public class ThreadOutputMuxer +{ + private final Iterator<ProjectSegment> projects; + + private final ThreadLocal<ProjectSegment> projectBuildThreadLocal = new ThreadLocal<ProjectSegment>(); + + private final Map<ProjectSegment, ByteArrayOutputStream> streams = + new HashMap<ProjectSegment, ByteArrayOutputStream>(); + + private final Map<ProjectSegment, PrintStream> printStreams = new HashMap<ProjectSegment, PrintStream>(); + + private final ByteArrayOutputStream defaultOutputStreamForUnknownData = new ByteArrayOutputStream(); + + private final PrintStream defaultPringStream = new PrintStream( defaultOutputStreamForUnknownData ); + + private final Set<ProjectSegment> completedBuilds = Collections.synchronizedSet( new HashSet<ProjectSegment>() ); + + private volatile ProjectSegment currentBuild; + + private final PrintStream originalSystemOUtStream; + + private final ConsolePrinter printer; + + /** + * A simple but safe solution for printing to the console. + */ + + class ConsolePrinter + implements Runnable + { + public volatile boolean running; + + private final ProjectBuildList projectBuildList; + + ConsolePrinter( ProjectBuildList projectBuildList ) + { + this.projectBuildList = projectBuildList; + } + + public void run() + { + running = true; + for ( ProjectSegment projectBuild : projectBuildList ) + { + final PrintStream projectStream = printStreams.get( projectBuild ); + ByteArrayOutputStream projectOs = streams.get( projectBuild ); + + do + { + synchronized ( projectStream ) + { + try + { + projectStream.wait( 100 ); + } + catch ( InterruptedException e ) + { + throw new RuntimeException( e ); + } + try + { + projectOs.writeTo( originalSystemOUtStream ); + } + catch ( IOException e ) + { + throw new RuntimeException( e ); + } + + projectOs.reset(); + } + } + while ( !completedBuilds.contains( projectBuild ) ); + } + running = false; + } + + /* + Wait until we are sure the print-stream thread is running. + */ + + public void waitUntilRunning( boolean expect ) + { + while ( !running == expect ) + { + try + { + Thread.sleep( 10 ); + } + catch ( InterruptedException e ) + { + throw new RuntimeException( e ); + } + } + } + } + + public ThreadOutputMuxer( ProjectBuildList segmentChunks, PrintStream originalSystemOut ) + { + projects = segmentChunks.iterator(); + for ( ProjectSegment segmentChunk : segmentChunks ) + { + final ByteArrayOutputStream value = new ByteArrayOutputStream(); + streams.put( segmentChunk, value ); + printStreams.put( segmentChunk, new PrintStream( value ) ); + } + setNext(); + this.originalSystemOUtStream = originalSystemOut; + System.setOut( new ThreadBoundPrintStream( this.originalSystemOUtStream ) ); + printer = new ConsolePrinter( segmentChunks ); + new Thread( printer ).start(); + printer.waitUntilRunning( true ); + } + + public void close() + { + printer.waitUntilRunning( false ); + System.setOut( this.originalSystemOUtStream ); + } + + private void setNext() + { + currentBuild = projects.hasNext() ? projects.next() : null; + } + + private boolean ownsRealOutputStream( ProjectSegment projectBuild ) + { + return projectBuild.equals( currentBuild ); + } + + private PrintStream getThreadBoundPrintStream() + { + ProjectSegment threadProject = projectBuildThreadLocal.get(); + if ( threadProject == null ) + { + return defaultPringStream; + } + if ( ownsRealOutputStream( threadProject ) ) + { + return originalSystemOUtStream; + } + return printStreams.get( threadProject ); + } + + public void associateThreadWithProjectSegment( ProjectSegment projectBuild ) + { + projectBuildThreadLocal.set( projectBuild ); + } + + public void setThisModuleComplete( ProjectSegment projectBuild ) + { + completedBuilds.add( projectBuild ); + PrintStream stream = printStreams.get( projectBuild ); + synchronized ( stream ) + { + stream.notifyAll(); + } + disconnectThreadFromProject(); + } + + private void disconnectThreadFromProject() + { + projectBuildThreadLocal.remove(); + } + + private class ThreadBoundPrintStream + extends PrintStream + { + + public ThreadBoundPrintStream( PrintStream systemOutStream ) + { + super( systemOutStream ); + } + + private PrintStream getOutputStreamForCurrentThread() + { + return getThreadBoundPrintStream(); + } + + @Override + public void println() + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.println(); + currentStream.notifyAll(); + } + } + + @Override + public void print( char c ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.print( c ); + currentStream.notifyAll(); + } + } + + @Override + public void println( char x ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.println( x ); + currentStream.notifyAll(); + } + } + + @Override + public void print( double d ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.print( d ); + currentStream.notifyAll(); + } + } + + @Override + public void println( double x ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.println( x ); + currentStream.notifyAll(); + } + } + + @Override + public void print( float f ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.print( f ); + currentStream.notifyAll(); + } + } + + @Override + public void println( float x ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.println( x ); + currentStream.notifyAll(); + } + } + + @Override + public void print( int i ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.print( i ); + currentStream.notifyAll(); + } + } + + @Override + public void println( int x ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.println( x ); + currentStream.notifyAll(); + } + } + + @Override + public void print( long l ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.print( l ); + currentStream.notifyAll(); + } + } + + @Override + public void println( long x ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.print( x ); + currentStream.notifyAll(); + } + } + + @Override + public void print( boolean b ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.print( b ); + currentStream.notifyAll(); + } + } + + @Override + public void println( boolean x ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.print( x ); + currentStream.notifyAll(); + } + } + + @Override + public void print( char s[] ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.print( s ); + currentStream.notifyAll(); + } + } + + @Override + public void println( char x[] ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.print( x ); + currentStream.notifyAll(); + } + } + + @Override + public void print( Object obj ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.print( obj ); + currentStream.notifyAll(); + } + } + + @Override + public void println( Object x ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.println( x ); + currentStream.notifyAll(); + } + } + + @Override + public void print( String s ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.print( s ); + currentStream.notifyAll(); + } + } + + @Override + public void println( String x ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.println( x ); + currentStream.notifyAll(); + } + } + + @Override + public void write( byte b[], int off, int len ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.write( b, off, len ); + currentStream.notifyAll(); + } + } + + @Override + public void close() + { + getOutputStreamForCurrentThread().close(); + } + + @Override + public void flush() + { + getOutputStreamForCurrentThread().flush(); + } + + @Override + public void write( int b ) + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.write( b ); + currentStream.notifyAll(); + } + } + + @Override + public void write( byte b[] ) + throws IOException + { + final PrintStream currentStream = getOutputStreamForCurrentThread(); + synchronized ( currentStream ) + { + currentStream.write( b ); + currentStream.notifyAll(); + } + } + } +} |