| package org.apache.maven.plugin.surefire.booterclient.lazytestprovider; |
| |
| /* |
| * 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.booter.Command; |
| import org.apache.maven.surefire.api.booter.Shutdown; |
| |
| import java.io.IOException; |
| import java.util.Queue; |
| import java.util.concurrent.ConcurrentLinkedQueue; |
| import java.util.concurrent.Semaphore; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| import static org.apache.maven.surefire.api.booter.Command.BYE_ACK; |
| import static org.apache.maven.surefire.api.booter.Command.NOOP; |
| import static org.apache.maven.surefire.api.booter.Command.SKIP_SINCE_NEXT_TEST; |
| import static org.apache.maven.surefire.api.booter.Command.TEST_SET_FINISHED; |
| import static org.apache.maven.surefire.api.booter.Command.toRunClass; |
| import static org.apache.maven.surefire.api.booter.Command.toShutdown; |
| |
| /** |
| * An {@link java.io.InputStream} that, when read, provides test class names out of a queue. |
| * <br> |
| * The Stream provides only one test at a time, but only after {@link #provideNewTest()} has been invoked. |
| * <br> |
| * After providing each test class name, followed by a newline character, a flush is performed on the |
| * {@link FlushReceiver} provided by the {@link FlushReceiverProvider} that can be set using |
| * {@link #setFlushReceiverProvider(FlushReceiverProvider)}. |
| * <br> |
| * The instance is used only in reusable forks in {@link org.apache.maven.plugin.surefire.booterclient.ForkStarter} |
| * by one Thread. |
| * |
| * @author Andreas Gudian |
| * @author Tibor Digana (tibor17) |
| */ |
| public final class TestProvidingInputStream |
| extends DefaultCommandReader |
| { |
| private final Semaphore barrier = new Semaphore( 0 ); |
| |
| private final Queue<Command> commands = new ConcurrentLinkedQueue<>(); |
| |
| private final AtomicBoolean closed = new AtomicBoolean(); |
| |
| private final Queue<String> testClassNames; |
| |
| /** |
| * C'tor |
| * |
| * @param testClassNames source of the tests to be read from this stream |
| */ |
| public TestProvidingInputStream( Queue<String> testClassNames ) |
| { |
| this.testClassNames = testClassNames; |
| } |
| |
| /** |
| * For testing purposes. |
| */ |
| void testSetFinished() |
| { |
| if ( canContinue() ) |
| { |
| commands.add( TEST_SET_FINISHED ); |
| barrier.release(); |
| } |
| } |
| |
| @Override |
| public void skipSinceNextTest() |
| { |
| if ( canContinue() ) |
| { |
| commands.add( SKIP_SINCE_NEXT_TEST ); |
| barrier.release(); |
| } |
| } |
| |
| @Override |
| public void shutdown( Shutdown shutdownType ) |
| { |
| if ( canContinue() ) |
| { |
| commands.add( toShutdown( shutdownType ) ); |
| barrier.release(); |
| } |
| } |
| |
| @Override |
| public void noop() |
| { |
| if ( canContinue() ) |
| { |
| commands.add( NOOP ); |
| barrier.release(); |
| } |
| } |
| |
| @Override |
| public void acknowledgeByeEventReceived() |
| { |
| if ( canContinue() ) |
| { |
| commands.add( BYE_ACK ); |
| barrier.release(); |
| } |
| } |
| |
| @Override |
| protected Command nextCommand() |
| { |
| Command cmd = commands.poll(); |
| if ( cmd == null ) |
| { |
| String cmdData = testClassNames.poll(); |
| return cmdData == null ? TEST_SET_FINISHED : toRunClass( cmdData ); |
| } |
| else |
| { |
| return cmd; |
| } |
| } |
| |
| @Override |
| protected void beforeNextCommand() |
| throws IOException |
| { |
| awaitNextTest(); |
| } |
| |
| @Override |
| public boolean isClosed() |
| { |
| return closed.get(); |
| } |
| |
| /** |
| * Signal that a new test is to be provided. |
| */ |
| @Override |
| public void provideNewTest() |
| { |
| if ( canContinue() ) |
| { |
| barrier.release(); |
| } |
| } |
| |
| @Override |
| public void close() |
| { |
| if ( closed.compareAndSet( false, true ) ) |
| { |
| barrier.drainPermits(); |
| barrier.release(); |
| } |
| } |
| |
| private void awaitNextTest() |
| throws IOException |
| { |
| try |
| { |
| barrier.acquire(); |
| } |
| catch ( InterruptedException e ) |
| { |
| throw new IOException( e.getLocalizedMessage(), e ); |
| } |
| } |
| } |