| /* |
| * 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.uima.ducc.agent.launcher; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.PrintStream; |
| |
| import org.apache.uima.ducc.common.utils.DuccLogger; |
| import org.apache.uima.ducc.common.utils.id.DuccId; |
| |
| public class ProcessStreamConsumer extends Thread { |
| public static final String LS = System.getProperty("line.separator"); |
| |
| private InputStream is; |
| |
| private PrintStream os; |
| |
| DuccLogger logger; |
| |
| private DuccId workDuccId; |
| |
| private StringBuffer errStreamBuffer = new StringBuffer(); |
| |
| public ProcessStreamConsumer(DuccLogger logger, ThreadGroup threadGroup, final String threadName, |
| InputStream is, PrintStream os, DuccId workDuccId) { |
| super(threadGroup, threadName); |
| this.os = os; |
| this.is = is; |
| this.logger = logger; |
| setDaemon(true); |
| this.workDuccId = workDuccId; |
| } |
| |
| public String getDataFromStream() { |
| return errStreamBuffer.toString(); |
| } |
| |
| public void run() { |
| try { |
| |
| InputStreamReader in = new InputStreamReader(is); |
| BufferedReader reader = new BufferedReader(in); |
| String line; |
| while ((line = reader.readLine()) != null) { |
| line += LS; |
| if ("StdErrorReader".equals(Thread.currentThread().getName())) { |
| logger.error("ProcessStreamConsumer.run()", workDuccId, line.trim()); |
| os.print("ERR>>>" + line); |
| // Save stderr stream into a local buffer. When the process exits unexpectedly |
| // errors will be copied to a Process object. |
| errStreamBuffer.append(line.trim()); |
| } else { |
| logger.info("ProcessStreamConsumer.run()", workDuccId, line.trim()); |
| os.print("OUT>>>" + line); |
| } |
| // Check if duccling redirected its output streams to a log. If so, it would put |
| // out a marker that starts with "1200 Redirecting stdout". This is a clue to |
| // stop consuming from the process streams. Just close streams and |
| // return. |
| if (line.trim().startsWith("1200 Redirecting stdout")) { |
| break; |
| } |
| } |
| } catch (Exception x) { |
| } finally { |
| try { |
| os.flush(); |
| } catch (Exception e) { |
| System.out.println("Caught Exception While Flushing " + Thread.currentThread().getName() |
| + " Output Stream"); |
| } |
| try { |
| if (is != null) { |
| is.close(); |
| } |
| logger.debug("ProcessStreamConsumer.run()", workDuccId, |
| "Stream Consumer Thread Terminated - Process Streams Redirected to a Log"); |
| } catch (IOException e) { |
| // ignore |
| } |
| } |
| } |
| } |