+ /*
+ * We use a single-threaded executor for commits with a bounded queue capacity. If the
+ * queue capacity is reached, subsequent commit tasks will be rejected and the commits will
+ * fail. This is done to relieve back pressure. This should be an extreme scenario - either
+ * there's deadlock(s) somewhere and the controller is unstable or some rogue component is
+ * continuously hammering commits too fast or the controller is just over-capacity for the
+ * system it's running on.
+ */
+ ExecutorService commitExecutor = SpecialExecutors.newBoundedSingleThreadExecutor(
+ getMaxDataBrokerCommitQueueSize(), "WriteTxCommit");
+
+ /*
+ * We use an executor for commit ListenableFuture callbacks that favors reusing available
+ * threads over creating new threads at the expense of execution time. The assumption is
+ * that most ListenableFuture callbacks won't execute a lot of business logic where we want
+ * it to run quicker - many callbacks will likely just handle error conditions and do
+ * nothing on success. The executor queue capacity is bounded and, if the capacity is
+ * reached, subsequent submitted tasks will block the caller.
+ */
+ ExecutorService listenableFutureExecutor = SpecialExecutors.newBlockingBoundedCachedThreadPool(
+ getMaxDataBrokerFutureCallbackPoolSize(), getMaxDataBrokerFutureCallbackQueueSize(),
+ "CommitFutures");
+
+ DOMDataBrokerImpl newDataBroker = new DOMDataBrokerImpl(datastores,
+ new DeadlockDetectingListeningExecutorService(commitExecutor,
+ TransactionCommitDeadlockException.DEADLOCK_EXECUTOR_FUNCTION,
+ listenableFutureExecutor));
+
+ final CommitStatsMXBeanImpl commitStatsMXBean = new CommitStatsMXBeanImpl(
+ newDataBroker.getCommitStatsTracker(), JMX_BEAN_TYPE);
+ commitStatsMXBean.registerMBean();
+
+ final ThreadExecutorStatsMXBeanImpl commitExecutorStatsMXBean =
+ new ThreadExecutorStatsMXBeanImpl(commitExecutor, "CommitExecutorStats",
+ JMX_BEAN_TYPE, null);
+ commitExecutorStatsMXBean.registerMBean();
+
+ final ThreadExecutorStatsMXBeanImpl commitFutureStatsMXBean =
+ new ThreadExecutorStatsMXBeanImpl(listenableFutureExecutor,
+ "CommitFutureExecutorStats", JMX_BEAN_TYPE, null);
+ commitFutureStatsMXBean.registerMBean();
+
+ newDataBroker.setCloseable(new AutoCloseable() {
+ @Override
+ public void close() {
+ commitStatsMXBean.unregisterMBean();
+ commitExecutorStatsMXBean.unregisterMBean();
+ commitFutureStatsMXBean.unregisterMBean();
+ }
+ });