Add ServiceManager class

Added ServiceManager class to start a list of services, in order,
and stop them in reverse order.
Also addressed minor checkstyle issue in TopicSinkClient.

Enabled logging from tests.
Updated some comments.

Updated license date.
Added state checks and support for multi-threading.

Change-Id: Ie7f053d9884766fe199895691a57eb5a51b1d155
Issue-ID: POLICY-1542
Signed-off-by: Jim Hahn <jrh3@att.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/utils/src/main/java/org/onap/policy/common/utils/services/ServiceManagerException.java b/utils/src/main/java/org/onap/policy/common/utils/services/ServiceManagerException.java
new file mode 100644
index 00000000..3daa441a
--- /dev/null
+++ b/utils/src/main/java/org/onap/policy/common/utils/services/ServiceManagerException.java
@@ -0,0 +1,44 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP PAP
+ * ================================================================================
+ * 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.services;
+
+/**
+ * Exceptions thrown by the ServiceManager.
+ */
+public class ServiceManagerException extends Exception {
+    private static final long serialVersionUID = 1L;
+
+    public ServiceManagerException() {
+        super();
+    }
+
+    public ServiceManagerException(String message) {
+        super(message);
+    }
+
+    public ServiceManagerException(Throwable cause) {
+        super(cause);
+    }
+
+    public ServiceManagerException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}