diff options
Diffstat (limited to 'policy-endpoints/src/main/java')
2 files changed, 155 insertions, 0 deletions
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/client/TopicSinkClient.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/client/TopicSinkClient.java new file mode 100644 index 00000000..3188b8d4 --- /dev/null +++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/client/TopicSinkClient.java @@ -0,0 +1,104 @@ +/*- + * ============LICENSE_START======================================================= + * ONAP PAP + * ================================================================================ + * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved. + * Modifications Copyright (C) 2019 Nordix Foundation. + * ================================================================================ + * 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.List; + +import lombok.Getter; + +import org.onap.policy.common.endpoints.event.comm.TopicEndpoint; +import org.onap.policy.common.endpoints.event.comm.TopicSink; +import org.onap.policy.common.utils.coder.Coder; +import org.onap.policy.common.utils.coder.CoderException; +import org.onap.policy.common.utils.coder.StandardCoder; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Client for sending messages to a Topic using TopicSink. + */ +public class TopicSinkClient { + private static final Logger logger = LoggerFactory.getLogger(TopicSinkClient.class); + + /** + * Coder used to encode messages being sent to the topic. + */ + private static final Coder CODER = new StandardCoder(); + + /** + * Topic to which messages are published. + */ + @Getter + private final String topic; + + /** + * Where messages are published. + */ + private final TopicSink sink; + + /** + * Constructs the object. + * + * @param topic topic to which messages should be published + * @throws TopicSinkClientException if the topic does not exist + */ + public TopicSinkClient(final String topic) throws TopicSinkClientException { + this.topic = topic; + + final List<TopicSink> lst = getTopicSinks(topic); + if (lst.isEmpty()) { + throw new TopicSinkClientException("no sinks for topic: " + topic); + } + + this.sink = lst.get(0); + } + + /** + * Sends a message to the topic, after encoding the message as json. + * + * @param message message to be encoded and sent + * @return {@code true} if the message was successfully sent/enqueued, {@code false} otherwise + */ + public boolean send(final Object message) { + try { + final String json = CODER.encode(message); + return sink.send(json); + + } catch (RuntimeException | CoderException e) { + logger.warn("send to {} failed because of {}", topic, e.getMessage(), e); + return false; + } + } + + // the remaining methods are wrappers that can be overridden by junit tests + + /** + * Gets the sinks for a given topic. + * + * @param topic the topic of interest + * @return the sinks for the topic + */ + protected List<TopicSink> getTopicSinks(final String topic) { + return TopicEndpoint.manager.getTopicSinks(topic); + } +} diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/client/TopicSinkClientException.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/client/TopicSinkClientException.java new file mode 100644 index 00000000..608393b3 --- /dev/null +++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/client/TopicSinkClientException.java @@ -0,0 +1,51 @@ +/*- + * ============LICENSE_START======================================================= + * ONAP PAP + * ================================================================================ + * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved. + * Modifications Copyright (C) 2019 Nordix Foundation. + * ================================================================================ + * 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 TopicSink client classes. + */ +public class TopicSinkClientException extends Exception { + private static final long serialVersionUID = 1L; + + public TopicSinkClientException() { + super(); + } + + public TopicSinkClientException(final String message) { + super(message); + } + + public TopicSinkClientException(final Throwable cause) { + super(cause); + } + + public TopicSinkClientException(final String message, final Throwable cause) { + super(message, cause); + } + + public TopicSinkClientException(final String message, final Throwable cause, final boolean enableSuppression, + final boolean writableStackTrace) { + super(message, cause, enableSuppression, writableStackTrace); + } + +} |