| 1 | // Jomic - a viewer for comic book archives. |
| 2 | // Copyright (C) 2004-2011 Thomas Aglassinger |
| 3 | // |
| 4 | // This program is free software: you can redistribute it and/or modify |
| 5 | // it under the terms of the GNU General Public License as published by |
| 6 | // the Free Software Foundation, either version 3 of the License, or |
| 7 | // (at your option) any later version. |
| 8 | // |
| 9 | // This program is distributed in the hope that it will be useful, |
| 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | // GNU General Public License for more details. |
| 13 | // |
| 14 | // You should have received a copy of the GNU General Public License |
| 15 | // along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | package net.sf.jomic.tools; |
| 17 | |
| 18 | import java.io.BufferedReader; |
| 19 | import java.io.InputStream; |
| 20 | import java.io.InputStreamReader; |
| 21 | import java.util.List; |
| 22 | |
| 23 | import org.apache.commons.logging.Log; |
| 24 | import org.apache.commons.logging.LogFactory; |
| 25 | |
| 26 | /** |
| 27 | * Thread to get out or err of a Process, and append them to a list. |
| 28 | * |
| 29 | * @author Thomas Aglassinger |
| 30 | */ |
| 31 | public class ProcessOutputThread extends Thread |
| 32 | { |
| 33 | private static Log logger = LogFactory.getLog(ProcessOutputThread.class); |
| 34 | private String lastLineWritten; |
| 35 | private ConsoleOutputListener listener; |
| 36 | private boolean logOutputAsError; |
| 37 | private String nameOfStreamToWriteTo; |
| 38 | private Process process; |
| 39 | private BufferedReader reader; |
| 40 | private int streamType; |
| 41 | private List target; |
| 42 | |
| 43 | |
| 44 | public ProcessOutputThread( |
| 45 | final Process newProcess, |
| 46 | final InputStream stream, |
| 47 | final List newTarget, |
| 48 | final boolean newLogOutputAsError, |
| 49 | final Object newWaiter, |
| 50 | final ConsoleOutputListener newListener, |
| 51 | final int newStreamType) { |
| 52 | assert newProcess != null; |
| 53 | assert stream != null; |
| 54 | assert newTarget != null; |
| 55 | assert newWaiter != null; |
| 56 | assert (newStreamType == ConsoleOutputListener.STREAM_TYPE_ERR) |
| 57 | || (newStreamType == ConsoleOutputListener.STREAM_TYPE_OUT) : "newStreamType = " + newStreamType; |
| 58 | |
| 59 | reader = new BufferedReader(new InputStreamReader(stream)); |
| 60 | process = newProcess; |
| 61 | target = newTarget; |
| 62 | logOutputAsError = newLogOutputAsError; |
| 63 | listener = newListener; |
| 64 | streamType = newStreamType; |
| 65 | if (logOutputAsError) { |
| 66 | nameOfStreamToWriteTo = "stderr"; |
| 67 | } else { |
| 68 | nameOfStreamToWriteTo = "stdout"; |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Gets the last line written to output stream. If this is an error stream, it will most likely |
| 74 | * be the error message written by the process. |
| 75 | */ |
| 76 | public String getLastLineWritten() { |
| 77 | return lastLineWritten; |
| 78 | } |
| 79 | |
| 80 | public final void run() { |
| 81 | try { |
| 82 | boolean done = false; |
| 83 | String line; |
| 84 | |
| 85 | do { |
| 86 | line = reader.readLine(); |
| 87 | if (line != null) { |
| 88 | if (logOutputAsError) { |
| 89 | logger.error(line); |
| 90 | } else if (logger.isDebugEnabled()) { |
| 91 | logger.debug(line); |
| 92 | } |
| 93 | synchronized (target) { |
| 94 | target.add(line); |
| 95 | if (line.length() > 0) { |
| 96 | lastLineWritten = line; |
| 97 | } |
| 98 | if (listener != null) { |
| 99 | listener.lineWritten(process, line, streamType); |
| 100 | } |
| 101 | } |
| 102 | } else { |
| 103 | done = true; |
| 104 | } |
| 105 | } while (!done); |
| 106 | } catch (Throwable error) { |
| 107 | logger.error("cannot read from stream " + nameOfStreamToWriteTo, error); |
| 108 | } finally { |
| 109 | try { |
| 110 | reader.close(); |
| 111 | } catch (Throwable error2) { |
| 112 | logger.error("cannot close reader", error2); |
| 113 | } |
| 114 | } |
| 115 | } |
| 116 | } |