| /* |
| * 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.oodt.commons.exec; |
| |
| //OODT imports |
| import org.apache.oodt.commons.io.LoggerOutputStream; |
| |
| //JDK imports |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| /** |
| * Utilities for executing programs. |
| * |
| * @author mattmann (Chris Mattmann) |
| * @author bfoster (Brian Foster) |
| */ |
| public final class ExecUtils { |
| |
| private ExecUtils() throws InstantiationException { |
| throw new InstantiationException("Don't construct utility classes!"); |
| } |
| |
| public static String printCommandLine(String[] args) { |
| StringBuffer cmdLine = new StringBuffer(); |
| |
| if (args != null && args.length > 0) { |
| for (int i = 0; i < args.length; i++) { |
| cmdLine.append(args[i]); |
| cmdLine.append(" "); |
| } |
| } |
| |
| return cmdLine.toString(); |
| } |
| |
| public static int callProgram(String commandLine, Logger logger) |
| throws IOException { |
| return callProgram(commandLine, logger, null); |
| } |
| |
| public static int callProgram(String commandLine, OutputStream stdOutStream, |
| OutputStream stdErrStream) throws IOException { |
| return callProgram(commandLine, stdOutStream, stdErrStream, null); |
| } |
| |
| public static int callProgram(String commandLine, Logger logger, File workDir) |
| throws IOException { |
| LoggerOutputStream loggerInfoStream = null; |
| LoggerOutputStream loggerSevereStream = null; |
| try { |
| return callProgram( |
| commandLine, |
| loggerInfoStream = new LoggerOutputStream(logger, Level.INFO), |
| loggerSevereStream = new LoggerOutputStream(logger, Level.SEVERE), |
| workDir); |
| } catch (Exception e) { |
| throw new IOException(e); |
| } finally { |
| try { loggerInfoStream.close(); } catch (Exception e) {} |
| try { loggerSevereStream.close(); } catch (Exception e) {} |
| } |
| } |
| |
| public static int callProgram(String commandLine, OutputStream stdOutStream, |
| OutputStream stdErrStream, File workDir) throws IOException { |
| Process progProcess = null; |
| StreamGobbler errorGobbler = null, outputGobbler = null; |
| int returnVal = -1; |
| try { |
| progProcess = (workDir == null) ? Runtime.getRuntime().exec( |
| commandLine) : Runtime.getRuntime().exec(commandLine, null, |
| workDir); |
| errorGobbler = new StreamGobbler(progProcess.getErrorStream(), |
| "ERROR", stdErrStream); |
| outputGobbler = new StreamGobbler(progProcess.getInputStream(), |
| "OUTPUT", stdOutStream); |
| errorGobbler.start(); |
| outputGobbler.start(); |
| returnVal = progProcess.waitFor(); |
| return returnVal; |
| } catch (Exception e) { |
| e.printStackTrace(); |
| throw new IOException("Failed to run '" + commandLine |
| + "' -- return val = " + returnVal + " : " + e.getMessage()); |
| } finally { |
| if (errorGobbler != null) { |
| errorGobbler.stopGobblingAndDie(); |
| } |
| if (outputGobbler != null) { |
| outputGobbler.stopGobblingAndDie(); |
| } |
| try { progProcess.getErrorStream().close(); } catch (Exception e) {} |
| try { progProcess.getInputStream().close(); } catch (Exception e) {} |
| try { progProcess.getOutputStream().close(); } catch (Exception e) {} |
| } |
| } |
| |
| public static int callProgram(String commandLine, File workDir) |
| throws IOException { |
| Process p = Runtime.getRuntime().exec(commandLine, null, workDir); |
| return processProgram(p); |
| } |
| |
| public static int callProgram(String[] args, File workDir) |
| throws IOException { |
| Process p = Runtime.getRuntime().exec(args, null, workDir); |
| return processProgram(p); |
| } |
| |
| private static int processProgram(Process p) { |
| |
| StreamGobbler errorGobbler = new StreamGobbler(p.getErrorStream(), |
| "ERROR", System.err); |
| |
| // any output? |
| StreamGobbler outputGobbler = new StreamGobbler(p.getInputStream(), |
| "OUTPUT", System.out); |
| |
| errorGobbler.start(); |
| outputGobbler.start(); |
| int retVal = -1; |
| try { |
| retVal = p.waitFor(); |
| } catch (InterruptedException ignore) { |
| } finally { |
| // first stop the threads |
| if (outputGobbler != null && outputGobbler.isAlive()) { |
| outputGobbler.stopGobblingAndDie(); |
| outputGobbler = null; |
| } |
| |
| if (errorGobbler != null && errorGobbler.isAlive()) { |
| errorGobbler.stopGobblingAndDie(); |
| errorGobbler = null; |
| } |
| |
| try { p.getErrorStream().close(); } catch (Exception ignore) {} |
| try { p.getOutputStream().close(); } catch (Exception ignore) {} |
| try { p.getInputStream().close(); } catch (Exception ignore) {} |
| } |
| return retVal; |
| } |
| } |