| /* |
| * 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. |
| */ |
| package org.apache.geode.test.process; |
| |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Starts the stdout and stderr reader threads for a running process. Provides a mechanism to |
| * waitFor the process to terminate. |
| * </p> |
| * Extracted from ProcessWrapper. |
| * |
| */ |
| public class ProcessOutputReader { |
| |
| private boolean started; |
| |
| private final Process process; |
| private final ProcessStreamReader stdout; |
| private final ProcessStreamReader stderr; |
| |
| public ProcessOutputReader(final Process process, final ProcessStreamReader stdout, |
| final ProcessStreamReader stderr) { |
| this.process = process; |
| this.stdout = stdout; |
| this.stderr = stderr; |
| } |
| |
| public void start() { |
| synchronized (this) { |
| this.stdout.start(); |
| this.stderr.start(); |
| this.started = true; |
| } |
| } |
| |
| public boolean waitFor(final long timeout, final TimeUnit unit) throws InterruptedException { |
| synchronized (this) { |
| if (!this.started) { |
| throw new IllegalStateException("Must be started before waitFor"); |
| } |
| } |
| |
| final long startTime = System.nanoTime(); |
| |
| long millisToJoin = unit.toMillis(timeout); |
| this.stderr.join(millisToJoin); |
| |
| long nanosRemaining = unit.toNanos(timeout) - (System.nanoTime() - startTime); |
| millisToJoin = unit.toMillis(nanosRemaining); |
| this.stdout.join(millisToJoin); |
| |
| nanosRemaining = unit.toNanos(timeout) - (System.nanoTime() - startTime); |
| return waitForProcess(nanosRemaining, unit); |
| } |
| |
| private boolean waitForProcess(final long timeout, final TimeUnit unit) |
| throws InterruptedException { |
| long startTime = System.nanoTime(); |
| long nanosRemaining = unit.toNanos(timeout); |
| |
| while (nanosRemaining > 0) { |
| try { |
| this.process.exitValue(); |
| return true; |
| } catch (IllegalThreadStateException ex) { |
| if (nanosRemaining > 0) { |
| long millisToSleep = Math.min(TimeUnit.NANOSECONDS.toMillis(nanosRemaining) + 1, 100); |
| Thread.sleep(millisToSleep); |
| } |
| } |
| nanosRemaining = unit.toNanos(timeout) - (System.nanoTime() - startTime); |
| } |
| return false; |
| } |
| } |