1 files changed, 146 insertions, 0 deletions
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/impl/DmaapConsumerWrapper.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/impl/DmaapConsumerWrapper.java
new file mode 100644
index 00000000..0806c3d3
--- /dev/null
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/impl/DmaapConsumerWrapper.java
@@ -0,0 +1,146 @@
+/*
+ * ============LICENSE_START=======================================================
+ * policy-endpoints
+ * ================================================================================
+ * Copyright (C) 2017-2018 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.bus.internal.impl;
+
+import com.att.nsa.mr.client.impl.MRConsumerImpl;
+import com.att.nsa.mr.client.response.MRConsumerResponse;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.onap.policy.common.endpoints.event.comm.bus.internal.BusConsumer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * MR based consumer
+ */
+public abstract class DmaapConsumerWrapper implements BusConsumer {
+
+    /**
+     * logger
+     */
+    private static Logger logger = LoggerFactory.getLogger(DmaapConsumerWrapper.class);
+
+    /**
+     * Name of the "protocol" property.
+     */
+    protected static final String PROTOCOL_PROP = "Protocol";
+
+    /**
+     * fetch timeout
+     */
+    protected int fetchTimeout;
+
+    /**
+     * close condition
+     */
+    protected Object closeCondition = new Object();
+
+    /**
+     * MR Consumer
+     */
+    protected MRConsumerImpl consumer;
+
+    /**
+     * MR Consumer Wrapper
+     *
+     * @param servers messaging bus hosts
+     * @param topic topic
+     * @param apiKey API Key
+     * @param apiSecret API Secret
+     * @param username AAF Login
+     * @param password AAF Password
+     * @param consumerGroup Consumer Group
+     * @param consumerInstance Consumer Instance
+     * @param fetchTimeout Fetch Timeout
+     * @param fetchLimit Fetch Limit
+     * @throws MalformedURLException
+     */
+    public DmaapConsumerWrapper(List<String> servers, String topic, String apiKey, String apiSecret, String username,
+            String password, String consumerGroup, String consumerInstance, int fetchTimeout, int fetchLimit)
+            throws MalformedURLException {
+
+        this.fetchTimeout = fetchTimeout;
+
+        if (topic == null || topic.isEmpty()) {
+            throw new IllegalArgumentException("No topic for DMaaP");
+        }
+
+        this.consumer = new MRConsumerImpl(servers, topic, consumerGroup, consumerInstance, fetchTimeout, fetchLimit,
+                null, apiKey, apiSecret);
+
+        this.consumer.setUsername(username);
+        this.consumer.setPassword(password);
+    }
+
+    @Override
+    public Iterable<String> fetch() throws InterruptedException, IOException {
+        final MRConsumerResponse response = this.consumer.fetchWithReturnConsumerResponse();
+        if (response == null) {
+            logger.warn("{}: DMaaP NULL response received", this);
+
+            synchronized (closeCondition) {
+                closeCondition.wait(fetchTimeout);
+            }
+            return new ArrayList<>();
+        } else {
+            logger.debug("DMaaP consumer received {} : {}" + response.getResponseCode(), response.getResponseMessage());
+
+            if (response.getResponseCode() == null || !"200".equals(response.getResponseCode())) {
+
+                logger.error("DMaaP consumer received: {} : {}", response.getResponseCode(),
+                        response.getResponseMessage());
+
+                synchronized (closeCondition) {
+                    closeCondition.wait(fetchTimeout);
+                }
+
+                /* fall through */
+            }
+        }
+
+        if (response.getActualMessages() == null) {
+            return new ArrayList<>();
+        } else {
+            return response.getActualMessages();
+        }
+    }
+
+    @Override
+    public void close() {
+        synchronized (closeCondition) {
+            closeCondition.notifyAll();
+        }
+
+        this.consumer.close();
+    }
+
+    @Override
+    public String toString() {
+        return "DmaapConsumerWrapper [" + "consumer.getAuthDate()=" + consumer.getAuthDate()
+                + ", consumer.getAuthKey()=" + consumer.getAuthKey() + ", consumer.getHost()=" + consumer.getHost()
+                + ", consumer.getProtocolFlag()=" + consumer.getProtocolFlag() + ", consumer.getUsername()="
+                + consumer.getUsername() + "]";
+    }
+}