diff options
Diffstat (limited to 'policy-endpoints/src/main')
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); + } +} |