1 files changed, 178 insertions, 0 deletions
diff --git a/services/services-engine/src/main/java/org/onap/policy/apex/service/engine/event/impl/eventrequestor/EventRequestorProducer.java b/services/services-engine/src/main/java/org/onap/policy/apex/service/engine/event/impl/eventrequestor/EventRequestorProducer.java
new file mode 100644
index 000000000..4a972f2ce
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+++ b/services/services-engine/src/main/java/org/onap/policy/apex/service/engine/event/impl/eventrequestor/EventRequestorProducer.java
@@ -0,0 +1,178 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. 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.
+ * 
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.service.engine.event.impl.eventrequestor;
+
+import java.util.EnumMap;
+import java.util.Map;
+
+import org.onap.policy.apex.service.engine.event.ApexEventConsumer;
+import org.onap.policy.apex.service.engine.event.ApexEventException;
+import org.onap.policy.apex.service.engine.event.ApexEventProducer;
+import org.onap.policy.apex.service.engine.event.ApexEventRuntimeException;
+import org.onap.policy.apex.service.engine.event.PeeredReference;
+import org.onap.policy.apex.service.engine.event.SynchronousEventCache;
+import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters;
+import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Concrete implementation of an Apex event producer that sends one or more events to its peered
+ * event requestor consumer.
+ * 
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ * 
+ */
+public class EventRequestorProducer implements ApexEventProducer {
+    private static final Logger LOGGER = LoggerFactory.getLogger(EventRequestorProducer.class);
+
+    // The name for this producer
+    private String name = null;
+
+    // The peer references for this event handler
+    private final Map<EventHandlerPeeredMode, PeeredReference> peerReferenceMap =
+            new EnumMap<>(EventHandlerPeeredMode.class);
+
+    // The number of events sent
+    private int eventsSent = 0;
+
+    /*
+     * (non-Javadoc)
+     * 
+     * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#init(java.lang.String,
+     * org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters)
+     */
+    @Override
+    public void init(final String producerName, final EventHandlerParameters producerParameters)
+            throws ApexEventException {
+        this.name = producerName;
+
+        // Check and get the producer Properties
+        if (!(producerParameters
+                .getCarrierTechnologyParameters() instanceof EventRequestorCarrierTechnologyParameters)) {
+            final String errorMessage =
+                    "specified consumer properties are not applicable to event requestor producer (" + this.name + ")";
+            LOGGER.warn(errorMessage);
+            throw new ApexEventException(errorMessage);
+        }
+
+        // Check if we are in peered mode
+        if (!producerParameters.isPeeredMode(EventHandlerPeeredMode.REQUESTOR)) {
+            final String errorMessage = "Event Requestor producer (" + this.name
+                    + ") must run in peered requestor mode with a Event Requestor consumer";
+            LOGGER.warn(errorMessage);
+            throw new ApexEventException(errorMessage);
+        }
+    }
+
+    /*
+     * (non-Javadoc)
+     * 
+     * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#getName()
+     */
+    @Override
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * Get the number of events sent to date
+     * 
+     * @return the number of events received
+     */
+    public int getEventsSent() {
+        return eventsSent;
+    }
+
+    /*
+     * (non-Javadoc)
+     * 
+     * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#getPeeredReference(org.onap.
+     * policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode)
+     */
+    @Override
+    public PeeredReference getPeeredReference(final EventHandlerPeeredMode peeredMode) {
+        return peerReferenceMap.get(peeredMode);
+    }
+
+    /*
+     * (non-Javadoc)
+     * 
+     * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#setPeeredReference(org.onap.
+     * policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode,
+     * org.onap.policy.apex.service.engine.event.PeeredReference)
+     */
+    @Override
+    public void setPeeredReference(final EventHandlerPeeredMode peeredMode, final PeeredReference peeredReference) {
+        peerReferenceMap.put(peeredMode, peeredReference);
+    }
+
+    /*
+     * (non-Javadoc)
+     * 
+     * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#sendEvent(long, java.lang.
+     * String, java.lang.Object)
+     */
+    @Override
+    public void sendEvent(final long executionId, final String eventName, final Object eventObject) {
+        // Check if this is a synchronized event, if so we have received a reply
+        final SynchronousEventCache synchronousEventCache =
+                (SynchronousEventCache) peerReferenceMap.get(EventHandlerPeeredMode.SYNCHRONOUS);
+        if (synchronousEventCache != null) {
+            synchronousEventCache.removeCachedEventToApexIfExists(executionId);
+        }
+
+        // Find the peered consumer for this producer
+        final PeeredReference peeredRequestorReference = peerReferenceMap.get(EventHandlerPeeredMode.REQUESTOR);
+        if (peeredRequestorReference != null) {
+            // Find the event Response Consumer that will handle this request
+            final ApexEventConsumer consumer = peeredRequestorReference.getPeeredConsumer();
+            if (!(consumer instanceof EventRequestorConsumer)) {
+                final String errorMessage = "send of event to event consumer \""
+                        + peeredRequestorReference.getPeeredConsumer() + "\" failed,"
+                        + " event response consumer is not an instance of EventRequestorConsumer\n" + eventObject;
+                LOGGER.warn(errorMessage);
+                throw new ApexEventRuntimeException(errorMessage);
+            }
+
+            // Use the consumer to handle this event
+            final EventRequestorConsumer eventRequstConsumer = (EventRequestorConsumer) consumer;
+            eventRequstConsumer.processEvent(eventObject);
+
+            eventsSent++;
+        } else {
+            // No peered consumer defined
+            final String errorMessage = "send of event failed, event response consumer is not defined\n" + eventObject;
+            LOGGER.warn(errorMessage);
+            throw new ApexEventRuntimeException(errorMessage);
+        }
+    }
+
+    /*
+     * (non-Javadoc)
+     * 
+     * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#stop()
+     */
+    @Override
+    public void stop() {
+        // For event requestor, all the implementation is in the consumer
+    }
+}