Add neighbor lifecycle management.
* Made PIMNeighbor mostly immutable (apart from updatable timestamp)
* Equals and hashCode for PIMNeighbor
* Remove neighbor when we see a HELLO with holdTime==0
* Periodic task to time out neighbors who haven't sent a HELLO in a while
* Added a CLI command to view PIM neighbors
Change-Id: I59e52a847f7abcb8e9ac660c2cccace53e46867b
diff --git a/utils/misc/src/main/java/org/onlab/util/SafeRecurringTask.java b/utils/misc/src/main/java/org/onlab/util/SafeRecurringTask.java
new file mode 100644
index 0000000..756abdd
--- /dev/null
+++ b/utils/misc/src/main/java/org/onlab/util/SafeRecurringTask.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2016 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onlab.util;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Wrapper for a recurring task which catches all exceptions to prevent task
+ * being suppressed in a ScheduledExecutorService.
+ */
+public final class SafeRecurringTask implements Runnable {
+
+ private static final Logger log = LoggerFactory.getLogger(SafeRecurringTask.class);
+
+ private final Runnable runnable;
+
+ /**
+ * Constructor.
+ *
+ * @param runnable runnable to wrap
+ */
+ private SafeRecurringTask(Runnable runnable) {
+ this.runnable = runnable;
+ }
+
+ @Override
+ public void run() {
+ if (Thread.currentThread().isInterrupted()) {
+ log.info("Task interrupted, quitting");
+ return;
+ }
+
+ try {
+ runnable.run();
+ } catch (Exception e) {
+ // Catch all exceptions to avoid task being suppressed
+ log.error("Exception thrown during task", e);
+ }
+ }
+
+ /**
+ * Wraps a runnable in a safe recurring task.
+ *
+ * @param runnable runnable to wrap
+ * @return safe recurring task
+ */
+ public static SafeRecurringTask wrap(Runnable runnable) {
+ return new SafeRecurringTask(runnable);
+ }
+
+}