@Override
public void initialize(String shardIdToProcess) {
try {
this.shardId = shardIdToProcess;
try {
this.process = startProcess();
} catch (IOException e) {
/*
* The process builder has thrown an exception while starting the child process so we would like to shut
* down
*/
throw new IOException("Failed to start client executable", e);
}
// Initialize all of our utility objects that will handle interacting with the process over
// STDIN/STDOUT/STDERR
messageWriter.initialize(process.getOutputStream(), shardId, objectMapper, executorService);
messageReader.initialize(process.getInputStream(), shardId, objectMapper, executorService);
readSTDERRTask.initialize(process.getErrorStream(), shardId, "Reading STDERR for " + shardId);
// Submit the error reader for execution
stderrReadTask = executorService.submit(readSTDERRTask);
protocol = new MultiLangProtocol(messageReader, messageWriter, shardId);
if (!protocol.initialize()) {
throw new RuntimeException("Failed to initialize child process");
}
initialized = true;
} catch (Throwable t) {
// Any exception in initialize results in MultiLangDaemon shutdown.
stopProcessing("Encountered an error while trying to initialize record processor", t);
}
}
