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authorJim Hahn <jrh3@att.com>2020-02-14 11:15:13 -0500
committerJim Hahn <jrh3@att.com>2020-02-14 13:50:23 -0500
commit9360a389f976d2b0d323846292ebe33e3229c228 (patch)
tree5374ca41ca46c568a34cb12704baa21caab2f86e /policy-endpoints/src/main/java
parentd5229beabe407eeef2cd56c57a525f5e36245bf0 (diff)
Added BidirectionalTopicClient to policy-common
Added review comments: - check for too many topic sources Issue-ID: POLICY-2363 Signed-off-by: Jim Hahn <jrh3@att.com> Change-Id: I89f34c4f756fb0c938dd7dda5896f3426cfc7ac2
Diffstat (limited to 'policy-endpoints/src/main/java')
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/client/BidirectionalTopicClient.java109
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/client/BidirectionalTopicClientException.java49
2 files changed, 158 insertions, 0 deletions
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/client/BidirectionalTopicClient.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/client/BidirectionalTopicClient.java
new file mode 100644
index 00000000..a1e03155
--- /dev/null
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/client/BidirectionalTopicClient.java
@@ -0,0 +1,109 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2020 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.endpoints.event.comm.client;
+
+import java.util.Arrays;
+import java.util.List;
+import lombok.Getter;
+import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
+import org.onap.policy.common.endpoints.event.comm.TopicEndpoint;
+import org.onap.policy.common.endpoints.event.comm.TopicEndpointManager;
+import org.onap.policy.common.endpoints.event.comm.TopicListener;
+import org.onap.policy.common.endpoints.event.comm.TopicSink;
+import org.onap.policy.common.endpoints.event.comm.TopicSource;
+
+/**
+ * A "bidirectional" topic, which is a pair of topics, one of which is used to publish
+ * requests and the other to receive responses.
+ */
+@Getter
+public class BidirectionalTopicClient {
+ private final String sinkTopic;
+ private final String sourceTopic;
+ private final TopicSinkClient sinkClient;
+ private final TopicSource source;
+ private final CommInfrastructure sinkTopicCommInfrastructure;
+ private final CommInfrastructure sourceTopicCommInfrastructure;
+
+ /**
+ * Constructs the object.
+ *
+ * @param sinkTopic sink topic name
+ * @param sourceTopic source topic name
+ * @throws BidirectionalTopicClientException if either topic does not exist
+ */
+ public BidirectionalTopicClient(String sinkTopic, String sourceTopic) throws BidirectionalTopicClientException {
+ this.sinkTopic = sinkTopic;
+ this.sourceTopic = sourceTopic;
+
+ // init sinkClient
+ try {
+ // if the manager is overridden here, then override it in the sink client, too
+ this.sinkClient = new TopicSinkClient(sinkTopic) {
+ @Override
+ protected List<TopicSink> getTopicSinks(String topic) {
+ return BidirectionalTopicClient.this.getTopicEndpointManager().getTopicSinks(topic);
+ }
+ };
+ } catch (TopicSinkClientException e) {
+ throw new BidirectionalTopicClientException(e);
+ }
+
+ // init source
+ List<TopicSource> sources = getTopicEndpointManager().getTopicSources(Arrays.asList(sourceTopic));
+ if (sources.isEmpty()) {
+ throw new BidirectionalTopicClientException("no sources for topic: " + sourceTopic);
+ } else if (sources.size() > 1) {
+ throw new BidirectionalTopicClientException("too many sources for topic: " + sourceTopic);
+ }
+
+ this.source = sources.get(0);
+
+ this.sinkTopicCommInfrastructure = sinkClient.getSink().getTopicCommInfrastructure();
+ this.sourceTopicCommInfrastructure = source.getTopicCommInfrastructure();
+ }
+
+ public TopicSink getSink() {
+ return sinkClient.getSink();
+ }
+
+ public boolean send(Object message) {
+ return sinkClient.send(message);
+ }
+
+ public void register(TopicListener topicListener) {
+ source.register(topicListener);
+ }
+
+ public boolean offer(String event) {
+ return source.offer(event);
+ }
+
+ public void unregister(TopicListener topicListener) {
+ source.unregister(topicListener);
+ }
+
+ // these may be overridden by junit tests
+
+ protected TopicEndpoint getTopicEndpointManager() {
+ return TopicEndpointManager.getManager();
+ }
+}
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/client/BidirectionalTopicClientException.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/client/BidirectionalTopicClientException.java
new file mode 100644
index 00000000..3a5d727b
--- /dev/null
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/client/BidirectionalTopicClientException.java
@@ -0,0 +1,49 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2020 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.endpoints.event.comm.client;
+
+/**
+ * Exception thrown by BidirectionalTopicClient class.
+ */
+public class BidirectionalTopicClientException extends Exception {
+ private static final long serialVersionUID = 1L;
+
+ public BidirectionalTopicClientException() {
+ super();
+ }
+
+ public BidirectionalTopicClientException(String message) {
+ super(message);
+ }
+
+ public BidirectionalTopicClientException(Throwable cause) {
+ super(cause);
+ }
+
+ public BidirectionalTopicClientException(String message, Throwable cause) {
+ super(message, cause);
+ }
+
+ public BidirectionalTopicClientException(String message, Throwable cause, boolean enableSuppression,
+ boolean writableStackTrace) {
+ super(message, cause, enableSuppression, writableStackTrace);
+ }
+}