add SDC client and reception handle

[multicloud/framework.git] / artifactbroker / reception / src / main / java / org / onap / policy / distribution / reception / handling / AbstractReceptionHandler.java

diff --git a/artifactbroker/reception/src/main/java/org/onap/policy/distribution/reception/handling/AbstractReceptionHandler.java b/artifactbroker/reception/src/main/java/org/onap/policy/distribution/reception/handling/AbstractReceptionHandler.java
new file mode 100644 (file)
index 0000000..7081dc7
--- /dev/null
+++ b/artifactbroker/reception/src/main/java/org/onap/policy/distribution/reception/handling/AbstractReceptionHandler.java
@@ -0,0 +1,89 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 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.distribution.reception.handling;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+import org.onap.policy.common.logging.flexlogger.FlexLogger;
+import org.onap.policy.common.logging.flexlogger.Logger;
+import org.onap.policy.common.parameters.ParameterService;
+import org.onap.policy.distribution.forwarding.ArtifactForwarder;
+import org.onap.policy.distribution.forwarding.ArtifactForwardingException;
+import org.onap.policy.distribution.model.PolicyInput;
+import org.onap.policy.distribution.reception.decoding.PluginInitializationException;
+import org.onap.policy.distribution.reception.decoding.PolicyDecodingException;
+import org.onap.policy.distribution.reception.parameters.ReceptionHandlerParameters;
+
+import org.onap.sdc.api.notification.IArtifactInfo;
+/**
+ * Base implementation of {@link ReceptionHandler}. All reception handlers should extend this base class by implementing
+ * the {@link #initializeReception(String)} method to perform the specific initialization required to receive inputs and
+ * by invoking {@link #inputReceived(PolicyInput)} when the reception handler receives input.
+ */
+public abstract class AbstractReceptionHandler implements ReceptionHandler {
+
+    private static final Logger LOGGER = FlexLogger.getLogger(AbstractReceptionHandler.class);
+
+    private PluginHandler pluginHandler;
+
+    /**
+     * {@inheritDoc}.
+     */
+    @Override
+    public void initialize(final String parameterGroupName) throws PluginInitializationException {
+        final ReceptionHandlerParameters receptionHandlerParameters = ParameterService.get(parameterGroupName);
+        pluginHandler = new PluginHandler(receptionHandlerParameters.getPluginHandlerParameters().getName());
+        initializeReception(receptionHandlerParameters.getReceptionHandlerConfigurationName());
+    }
+
+    /**
+     * Sub classes must implement this method to perform the specific initialization required to receive inputs, for
+     * example setting up subscriptions.
+     *
+     * @param parameterGroupName the parameter group name
+     * @throws PluginInitializationException if initialization of reception handler fails
+     */
+    protected abstract void initializeReception(String parameterGroupName) throws PluginInitializationException;
+
+    /**
+     * Handle input that has been received. The given input shall be decoded using the s configured
+     * for this reception handler and forwarded using the {@link ArtifactForwarder}s configured for this reception
+     * handler.
+     *
+     * @param policyInput the input that has been received
+     * @throws PolicyDecodingException if an error occurs in decoding a policy from the received input
+     */
+    protected void inputReceived(final PolicyInput policyInput) throws PolicyDecodingException {
+
+        final Collection<IArtifactInfo> policies = new ArrayList<>();
+
+        for (final ArtifactForwarder policyForwarder : pluginHandler.getArtifactForwarders()) {
+            try {
+                policyForwarder.forward(policies);
+            } catch (final ArtifactForwardingException policyForwardingException) {
+                LOGGER.error("Error when forwarding policies to " + policyForwarder, policyForwardingException);
+            }
+        }
+    }
+
+
+}