mynameborat commented on a change in pull request #938: SAMZA-1531: Support
run.id in standalone for batch processing.
URL: https://github.com/apache/samza/pull/938#discussion_r264938632
##########
File path:
samza-core/src/main/java/org/apache/samza/runtime/LocalApplicationRunner.java
##########
@@ -77,16 +90,70 @@
*/
public LocalApplicationRunner(SamzaApplication app, Config config) {
this.appDesc = ApplicationDescriptorUtil.getAppDescriptor(app, config);
- this.planner = new LocalJobPlanner(appDesc);
+ Boolean isAppModeBatch = new
ApplicationConfig(appDesc.getConfig()).getAppMode() ==
ApplicationConfig.ApplicationMode.BATCH;
+ if(isAppModeBatch) {
+ initializeCoordinationUtils(config);
+ initializeRunId();
+ }
+ this.planner = new LocalJobPlanner(appDesc, coordinationUtils, uid, runId);
}
/**
* Constructor only used in unit test to allow injection of {@link
LocalJobPlanner}
*/
@VisibleForTesting
- LocalApplicationRunner(ApplicationDescriptorImpl<? extends
ApplicationDescriptor> appDesc, LocalJobPlanner planner) {
+ LocalApplicationRunner(ApplicationDescriptorImpl<? extends
ApplicationDescriptor> appDesc, LocalJobPlanner planner, CoordinationUtils
coordinationUtils) {
this.appDesc = appDesc;
this.planner = planner;
+ this.coordinationUtils = coordinationUtils;
+ Boolean isAppModeBatch = new
ApplicationConfig(appDesc.getConfig()).getAppMode() ==
ApplicationConfig.ApplicationMode.BATCH;
+ if(isAppModeBatch) {
+ initializeRunId();
+ }
+ }
+
+ private void initializeCoordinationUtils(Config config) {
+ JobCoordinatorConfig jcConfig = new JobCoordinatorConfig(config);
+ String coordinationId = new ApplicationConfig(config).getGlobalAppId() +
CoordinationConstants.APPLICATION_RUNNER_PATH_SUFFIX;
+ this.coordinationUtils =
jcConfig.getCoordinationUtilsFactory().getCoordinationUtils(coordinationId,
uid, config);
+ }
+
+ private void initializeRunId(){
+ LOG.info("Manasa: LocalApplicationRunner: getRunId() : entered ");
+ Boolean isAppModeBatch = new
ApplicationConfig(appDesc.getConfig()).getAppMode() ==
ApplicationConfig.ApplicationMode.BATCH;
+ if(coordinationUtils == null || !isAppModeBatch) {
+ return;
+ }
+
+ runIdLock =
coordinationUtils.getReadWriteLock(CoordinationConstants.RUNID_LOCK_ID);
+ runIdAccess = coordinationUtils.getDataAccess();
+
+ if(runIdAccess == null || runIdLock == null) {
+ LOG.warn("Processor {} failed to create utils for run.id generation",
uid);
+ return;
+ }
+
+ try {
+ // acquire lock to write or read run.id
+ DistributedReadWriteLock.AccessType lockAccess =
runIdLock.lock(CoordinationConstants.LOCK_TIMEOUT_MS, TimeUnit.MILLISECONDS);
+ if(lockAccess == DistributedReadWriteLock.AccessType.WRITE) {
+ LOG.info("write lock acquired for run.id generation by Processor " +
uid);
+ runId = String.valueOf(System.currentTimeMillis()) + "-" +
UUID.randomUUID().toString().substring(0, 8);
+ LOG.info("The run id for this run is {}", runId);
+ runIdAccess.writeData(CoordinationConstants.RUNID_PATH, runId, new
LocalDistributedDataWatcher());
+ runIdLock.unlock();
+ } else if(lockAccess == DistributedReadWriteLock.AccessType.READ) {
+ LOG.info("read lock acquired for run.id by Processor " + uid);
+ runId = (String)
runIdAccess.readData(CoordinationConstants.RUNID_PATH, new
LocalDistributedDataWatcher());
+ runIdLock.unlock();
+ } else {
+ String msg = String.format("Processor {} failed to get the lock for
run.id", uid);
+ throw new SamzaException(msg);
+ }
+ } catch (TimeoutException e) {
+ String msg = String.format("Processor {} timed out waiting to acquire
lock for run.id generation", uid);
+ throw new SamzaException(msg, e);
+ }
Review comment:
can we invoke `runIdLock.unlock` in a finally block instead to make sure we
unlock the lock in the event of exceptions?
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
With regards,
Apache Git Services
