- ImmutableMap<LogicalDatastoreType, DOMStore> datastores = ImmutableMap
- .<LogicalDatastoreType, DOMStore> builder().put(LogicalDatastoreType.OPERATIONAL, operStore)
- .put(LogicalDatastoreType.CONFIGURATION, configStore).build();
+
+ final Map<LogicalDatastoreType, DOMStore> datastores = new EnumMap<>(LogicalDatastoreType.class);
+ datastores.put(LogicalDatastoreType.OPERATIONAL, operStore);
+ datastores.put(LogicalDatastoreType.CONFIGURATION, configStore);
+
+ /*
+ * 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");