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PlantUML is a component that allows to quickly write diagrams from text.
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
* |
* | PlantUML : a free UML diagram generator
* |
* +=======================================================================
*
* (C) Copyright 2009-2024, Arnaud Roques
*
* Project Info: https://plantuml.com
*
* If you like this project or if you find it useful, you can support us at:
*
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*
* PlantUML is free software; you can redistribute it and/or modify it
* under the terms of the Eclipse Public License.
*
* THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
* LICENSE ("AGREEMENT"). [Eclipse Public License - v 1.0]
*
* ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
* RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
*
* You may obtain a copy of the License at
*
* http://www.eclipse.org/legal/epl-v10.html
*
* 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.
*
* PlantUML can occasionally display sponsored or advertising messages. Those
* messages are usually generated on welcome or error images and never on
* functional diagrams.
* See https://plantuml.com/professional if you want to remove them
*
* Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
* are owned by the author of their corresponding sources code (that is, their
* textual description in PlantUML language). Those images are not covered by
* this EPL license.
*
* The generated images can then be used without any reference to the EPL license.
* It is not even necessary to stipulate that they have been generated with PlantUML,
* although this will be appreciated by the PlantUML team.
*
* There is an exception : if the textual description in PlantUML language is also covered
* by any license, then the generated images are logically covered
* by the very same license.
*
* This is the IGY distribution (Install GraphViz by Yourself).
* You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
* (see https://plantuml.com/graphviz-dot )
*
* Icons provided by OpenIconic : https://useiconic.com/open
* Archimate sprites provided by Archi : http://www.archimatetool.com
* Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
* Stdlib Icons provided https://github.com/tupadr3/plantuml-icon-font-sprites
* ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
* ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
* CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
* Brotli (c) by the Brotli Authors https://github.com/google/brotli
* Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
* Twemoji (c) by Twitter at https://twemoji.twitter.com/
*
*/
package net.sourceforge.plantuml.dot;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import net.sourceforge.plantuml.OptionFlags;
import net.sourceforge.plantuml.api.MyRunnable;
import net.sourceforge.plantuml.api.TimeoutExecutor;
import net.sourceforge.plantuml.log.Logme;
import net.sourceforge.plantuml.security.SFile;
public class ProcessRunner {
// ::remove file when __CORE__
private final String[] cmd;
private String error;
private String out;
private volatile ProcessState state = ProcessState.INIT();
private final Lock changeState = new ReentrantLock();
public ProcessRunner(String[] cmd) {
this.cmd = cmd;
}
public ProcessState run(byte in[], OutputStream redirection) {
return run(in, redirection, null);
}
public ProcessState run(byte in[], OutputStream redirection, SFile dir) {
if (this.state.differs(ProcessState.INIT())) {
throw new IllegalStateException();
}
this.state = ProcessState.RUNNING();
final MainThread mainThread = new MainThread(cmd, dir, redirection, in);
try {
// http://steveliles.github.io/invoking_processes_from_java.html
final long timeoutMs = OptionFlags.getInstance().getTimeoutMs();
final boolean done = new TimeoutExecutor(timeoutMs).executeNow(mainThread);
} finally {
changeState.lock();
try {
if (state.equals(ProcessState.RUNNING())) {
state = ProcessState.TIMEOUT();
// mainThread.cancel();
}
} finally {
changeState.unlock();
}
}
if (state.equals(ProcessState.TERMINATED_OK())) {
assert mainThread != null;
this.error = mainThread.getError();
this.out = mainThread.getOut();
}
return state;
}
class MainThread implements MyRunnable {
private final String[] cmd;
private final SFile dir;
private final OutputStream redirection;
private final byte[] in;
private volatile Process process;
private volatile ThreadStream errorStream;
private volatile ThreadStream outStream;
public MainThread(String[] cmd, SFile dir, OutputStream redirection, byte[] in) {
this.cmd = cmd;
this.dir = dir;
this.redirection = redirection;
this.in = in;
}
public String getOut() {
return outStream.getString();
}
public String getError() {
return errorStream.getString();
}
public void runJob() throws InterruptedException {
try {
startThreads();
if (state.equals(ProcessState.RUNNING())) {
final int result = joinInternal();
}
} finally {
changeState.lock();
try {
if (state.equals(ProcessState.RUNNING())) {
state = ProcessState.TERMINATED_OK();
}
} finally {
changeState.unlock();
}
if (process != null) {
process.destroy();
close(process.getErrorStream());
close(process.getOutputStream());
close(process.getInputStream());
}
}
}
public void cancelJob() {
// The changeState lock is ok
// assert changeState.tryLock();
// assert state == ProcessState.TIMEOUT;
if (process != null) {
errorStream.cancel();
outStream.cancel();
process.destroy();
// interrupt();
close(process.getErrorStream());
close(process.getOutputStream());
close(process.getInputStream());
}
}
private void startThreads() {
try {
process = Runtime.getRuntime().exec(cmd, null, dir == null ? null : dir.conv());
} catch (IOException e) {
Logme.error(e);
changeState.lock();
try {
state = ProcessState.IO_EXCEPTION1(e);
} finally {
changeState.unlock();
}
Logme.error(e);
return;
}
errorStream = new ThreadStream(process.getErrorStream(), null);
outStream = new ThreadStream(process.getInputStream(), redirection);
errorStream.start();
outStream.start();
if (in != null) {
final OutputStream os = process.getOutputStream();
try {
try {
os.write(in);
} finally {
os.close();
}
} catch (IOException e) {
changeState.lock();
try {
state = ProcessState.IO_EXCEPTION2(e);
} finally {
changeState.unlock();
}
Logme.error(e);
}
}
}
public int joinInternal() throws InterruptedException {
errorStream.join();
outStream.join();
final int result = process.waitFor();
return result;
}
}
class ThreadStream extends Thread {
private volatile InputStream streamToRead;
private volatile OutputStream redirection;
private volatile StringBuffer sb = new StringBuffer();
ThreadStream(InputStream streamToRead, OutputStream redirection) {
this.streamToRead = streamToRead;
this.redirection = redirection;
}
public String getString() {
if (sb == null) {
return "";
}
return sb.toString();
}
public void cancel() {
assert state.equals(ProcessState.TIMEOUT()) || state.equals(ProcessState.RUNNING()) : state;
this.interrupt();
sb = null;
streamToRead = null;
redirection = null;
// Because of this, some NPE may occurs in run() method, but we do not care
}
@Override
public void run() {
int read = 0;
try {
while ((read = streamToRead.read()) != -1) {
if (state.equals(ProcessState.TIMEOUT())) {
return;
}
if (redirection == null) {
sb.append((char) read);
} else {
redirection.write(read);
}
}
} catch (Throwable e) {
System.err.println("ProcessRunnerA " + e);
Logme.error(e);
sb.append('\n');
sb.append(e.toString());
}
}
}
public final String getError() {
return error;
}
public final String getOut() {
return out;
}
private void close(InputStream is) {
try {
if (is != null) {
is.close();
}
} catch (IOException e) {
Logme.error(e);
}
}
private void close(OutputStream os) {
try {
if (os != null) {
os.close();
}
} catch (IOException e) {
Logme.error(e);
}
}
}