Examples with ProcessStreamGobbler alma.acs.util.ProcessStreamGobbler used on opensource projects

Example 1 with ProcessStreamGobbler

use of alma.acs.util.ProcessStreamGobbler in project ACS by ACS-Community.

the class ProcessUtilTest method testJava.

/**
	 * Tests ProcesUtil with java processes
	 */
public void testJava() throws Exception {
    Class<?> testClass = ProcessUtilTestDummy.class;
    assertFalse(processUtil.isJavaProcessRunning(testClass));
    // run dummy process
    Process proc = runDummyProcess();
    ProcessStreamGobbler gobbler = new ProcessStreamGobbler(proc, new DaemonThreadFactory(), true);
    assertFalse("Dummy java process is supposed to still run after 3.5 seconds", gobbler.gobble(3500, TimeUnit.MILLISECONDS));
    assertTrue(processUtil.isJavaProcessRunning(testClass));
    List<String> stdout = gobbler.getStdout();
    int msgCount = 0;
    for (String msg : stdout) {
        if (msg.startsWith("All is well ")) {
            // ignore other lines with acsStartJava script output
            msgCount++;
        }
    }
    assertEquals("Expected two 'All is well' messages in 3.5 seconds (after ~ 0 and 2 seconds).", 2, msgCount);
    List<String> stderr = gobbler.getStderr();
    assertEquals(0, stderr.size());
    // get PID of dummy process	
    List<String> pidList = processUtil.getJavaPIDs(testClass);
    assertEquals("Expected to find one running instance of " + testClass.getName() + ".", 1, pidList.size());
    logger.info("Found single dummy java class with PID=" + pidList.get(0));
    // kill process
    processUtil.killProcess(pidList.get(0), true);
    assertFalse(processUtil.isJavaProcessRunning(testClass));
}

Example 2 with ProcessStreamGobbler

use of alma.acs.util.ProcessStreamGobbler in project ACS by ACS-Community.

the class ProcessUtil method getJavaPIDs.

/**
	 * Gets a map with key=(running java main classes) and value=(list of the process IDs).
	 * Filters out sun.tools.jps.Jps which is the tool used to get the processes.
	 * @return Map<classname, pid-list>
	 * @throws IOException 
	 * @throws InterruptedException 
	 */
protected Map<String, List<String>> getJavaPIDs() throws IOException {
    // The following command returns lines of the format
    // 23551 com.cosylab.acs.maci.manager.app.Manager
    // 29113 sun.tools.jps.Jps
    String command = "jps -l";
    Process proc = Runtime.getRuntime().exec(command);
    ProcessStreamGobbler gob = new ProcessStreamGobbler(proc, new DaemonThreadFactory(), true);
    gob.setDebug(DEBUG);
    try {
        // read stdout and stderr
        if (!gob.gobble(10, TimeUnit.SECONDS)) {
            throw new IOException("Failed to execute command '" + command + "' within 10 seconds");
        }
        if (gob.hasStreamReadErrors()) {
            throw new IOException("Failed to read output of command '" + command + "'");
        }
    } catch (InterruptedException ex) {
        throw new IOException("Thread reading output of command '" + command + "' got interrupted.");
    }
    // evaluate jps output
    Map<String, List<String>> pidMap = new HashMap<String, List<String>>();
    List<String> outlines = gob.getStdout();
    String[] splitLine = null;
    for (String line : outlines) {
        if (line.length() > 0 && (splitLine = line.split(" ")).length == 2) {
            String cname = splitLine[1];
            if (!"sun.tools.jps.Jps".equals(cname)) {
                String pid = splitLine[0];
                List<String> pidList = pidMap.containsKey(cname) ? pidMap.get(cname) : new ArrayList<String>();
                pidList.add(pid);
                pidMap.put(cname, pidList);
            }
        } else {
            logger.info("jps returned unexpected line '" + line + "'");
        }
    }
    return pidMap;
}