| /* |
| * Copyright (c) 2013, 2021, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.test.lib.process; |
| |
| import java.io.BufferedReader; |
| import java.io.ByteArrayOutputStream; |
| import java.io.InputStream; |
| import java.io.StringReader; |
| import java.nio.charset.Charset; |
| import java.time.Instant; |
| import java.util.List; |
| import java.util.concurrent.CancellationException; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.Future; |
| import java.util.stream.Collectors; |
| |
| public interface OutputBuffer { |
| public static class OutputBufferException extends RuntimeException { |
| private static final long serialVersionUID = 8528687792643129571L; |
| |
| public OutputBufferException(Throwable cause) { |
| super(cause); |
| } |
| } |
| |
| /** |
| * Returns the stdout result |
| * |
| * @return stdout result |
| */ |
| public String getStdout(); |
| |
| /** |
| * Returns the stdout as a list. |
| * Empty List if application produced no output. |
| */ |
| default public List<String> getStdoutAsList() { |
| return new BufferedReader(new StringReader(getStdout())) |
| .lines() |
| .collect(Collectors.toList()); |
| } |
| |
| /** |
| * Returns the stderr result |
| * |
| * @return stderr result |
| */ |
| public String getStderr(); |
| public int getExitValue(); |
| |
| /** |
| * Returns the pid if available |
| * |
| * @return pid |
| */ |
| public long pid(); |
| |
| public static OutputBuffer of(Process p, Charset cs) { |
| return new LazyOutputBuffer(p, cs); |
| } |
| |
| public static OutputBuffer of(Process p) { |
| return new LazyOutputBuffer(p, null); |
| } |
| |
| public static OutputBuffer of(String stdout, String stderr, int exitValue) { |
| return new EagerOutputBuffer(stdout, stderr, exitValue); |
| } |
| |
| public static OutputBuffer of(String stdout, String stderr) { |
| return of(stdout, stderr, -1); |
| } |
| |
| class LazyOutputBuffer implements OutputBuffer { |
| private static class StreamTask { |
| private final ByteArrayOutputStream buffer; |
| private final Future<Void> future; |
| private final Charset cs; |
| |
| private StreamTask(InputStream stream, Charset cs) { |
| this.buffer = new ByteArrayOutputStream(); |
| this.cs = cs; |
| this.future = new StreamPumper(stream, buffer).process(); |
| } |
| |
| public String get() { |
| try { |
| future.get(); |
| return cs == null ? buffer.toString() : buffer.toString(cs); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| throw new OutputBufferException(e); |
| } catch (ExecutionException | CancellationException e) { |
| throw new OutputBufferException(e); |
| } |
| } |
| } |
| |
| private final StreamTask outTask; |
| private final StreamTask errTask; |
| private final Process p; |
| |
| private final void logProgress(String state) { |
| System.out.println("[" + Instant.now().toString() + "] " + state |
| + " for process " + p.pid()); |
| System.out.flush(); |
| } |
| |
| private LazyOutputBuffer(Process p, Charset cs) { |
| this.p = p; |
| logProgress("Gathering output"); |
| outTask = new StreamTask(p.getInputStream(), cs); |
| errTask = new StreamTask(p.getErrorStream(), cs); |
| } |
| |
| @Override |
| public String getStdout() { |
| return outTask.get(); |
| } |
| |
| @Override |
| public String getStderr() { |
| return errTask.get(); |
| } |
| |
| @Override |
| public int getExitValue() { |
| try { |
| logProgress("Waiting for completion"); |
| boolean aborted = true; |
| try { |
| int result = p.waitFor(); |
| logProgress("Waiting for completion finished"); |
| aborted = false; |
| return result; |
| } finally { |
| if (aborted) { |
| logProgress("Waiting for completion FAILED"); |
| } |
| } |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| throw new OutputBufferException(e); |
| } |
| } |
| |
| @Override |
| public long pid() { |
| return p.pid(); |
| } |
| } |
| |
| class EagerOutputBuffer implements OutputBuffer { |
| private final String stdout; |
| private final String stderr; |
| private final int exitValue; |
| |
| private EagerOutputBuffer(String stdout, String stderr, int exitValue) { |
| this.stdout = stdout; |
| this.stderr = stderr; |
| this.exitValue = exitValue; |
| } |
| |
| @Override |
| public String getStdout() { |
| return stdout; |
| } |
| |
| @Override |
| public String getStderr() { |
| return stderr; |
| } |
| |
| @Override |
| public int getExitValue() { |
| return exitValue; |
| } |
| |
| @Override |
| public long pid() { |
| throw new RuntimeException("no process"); |
| } |
| } |
| } |