/** This is a synchronous close operation for the logical node. */
public void close() throws IOException, InterruptedException {
if (driver != null) {
// stop the existing connector.
nodeMsg = nodeName + "closing";
driver.stop();
// wait for driver thread to end.
boolean success = driver.waitForAtLeastState(DriverState.IDLE, 30000);
if (!success) {
try {
driver.cancel(); // signal driver to finish
driver.join();
} catch (InterruptedException e) {
LOG.error("Unexpected interruption when closing logical node");
}
}
}
}
/**
* This stops any existing connection (source=>sink pumper), and then creates a new one with the
* specified *already opened* source and sink arguments.
*/
private void startNodeDriver() throws IOException {
if (driver != null) {
// stop the existing connector.
driver.stop();
try {
// default is 30s.
long timeout = FlumeConfiguration.get().getNodeCloseTimeout();
if (!driver.join(timeout)) {
LOG.error("Forcing driver to exit uncleanly");
driver.cancel(); // taking too long, cancel the thread
}
} catch (InterruptedException e) {
LOG.error("Previous driver took too long to close!", e);
}
}
// this will be replaceable with multi-threaded queueing versions or other
// mechanisms
driver = new DirectDriver("logicalNode " + nodeName, src, snk);
this.state.state = NodeState.ACTIVE;
driver.start();
reconfigures.incrementAndGet();
}
public ReportEvent getMetrics() {
ReportEvent rpt = new ReportEvent(nodeName);
rpt.setStringMetric("nodename", nodeName);
rpt.setStringMetric("version", new Date(lastGoodCfg.timestamp).toString());
rpt.setStringMetric("state", driver.getState().toString());
rpt.setStringMetric("hostname", state.host);
rpt.setStringMetric(
"sourceConfig", (lastGoodCfg.sourceConfig == null) ? "" : lastGoodCfg.sourceConfig);
rpt.setStringMetric(
"sinkConfig", (lastGoodCfg.sinkConfig == null) ? "" : lastGoodCfg.sinkConfig);
rpt.setStringMetric("message", nodeMsg);
rpt.setLongMetric(A_RECONFIGURES, reconfigures.get());
rpt.setStringMetric("physicalnode", state.physicalNode);
return rpt;
}