1 files changed, 78 insertions, 0 deletions
diff --git a/utils-test/src/main/java/org/onap/policy/common/utils/time/SleepItem.java b/utils-test/src/main/java/org/onap/policy/common/utils/time/SleepItem.java
new file mode 100644
index 00000000..1d318803
--- /dev/null
+++ b/utils-test/src/main/java/org/onap/policy/common/utils/time/SleepItem.java
@@ -0,0 +1,78 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.common.utils.time;
+
+import java.util.concurrent.CountDownLatch;
+
+/**
+ * Work item used when a thread invokes sleep(). The thread's "sleep()" method will
+ * enqueue this item and then invoke {@link #await()} to wait for the test/controlling
+ * thread to fire it, indicating that the end of the sleep time has been reached.
+ */
+public class SleepItem extends WorkItem {
+    /**
+     * Thread that invoked "sleep()".
+     */
+    private final Thread thread;
+
+    /**
+     * This will be decremented when this work item is fired, thus releasing the
+     * "sleeping" thread to continue its work.
+     */
+    private final CountDownLatch latch = new CountDownLatch(1);
+
+
+    /**
+     * Constructs the object.
+     *
+     * @param currentTime time with which this item is associated
+     * @param sleepMs time for which the thread should sleep
+     * @param thread thread that invoked "sleep()"
+     */
+    public SleepItem(TestTime currentTime, long sleepMs, Thread thread) {
+        super(currentTime, sleepMs);
+        this.thread = thread;
+    }
+
+    @Override
+    public void interrupt() {
+        thread.interrupt();
+    }
+
+    @Override
+    public void fire() {
+        latch.countDown();
+    }
+
+    /**
+     * Waits for the sleep time to be reached.
+     *
+     * @throws InterruptedException if the current thread is interrupted
+     */
+    public void await() throws InterruptedException {
+        latch.await();
+    }
+
+    @Override
+    public String toString() {
+        return "SleepItem [nextMs=" + getNextMs() + ", latch=" + latch + ", thread=" + thread + "]";
+    }
+}