add rest serve and distribution framework

[multicloud/framework.git] / artifactbroker / main / src / main / java / org / onap / policy / distribution / main / startstop / Main.java

diff --git a/artifactbroker/main/src/main/java/org/onap/policy/distribution/main/startstop/Main.java b/artifactbroker/main/src/main/java/org/onap/policy/distribution/main/startstop/Main.java
new file mode 100644 (file)
index 0000000..3ff85b8
--- /dev/null
+++ b/artifactbroker/main/src/main/java/org/onap/policy/distribution/main/startstop/Main.java
@@ -0,0 +1,149 @@
+/*-
+ * ============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.main.startstop;
+
+import java.util.Arrays;
+
+import org.onap.policy.common.logging.flexlogger.FlexLogger;
+import org.onap.policy.common.logging.flexlogger.Logger;
+import org.onap.policy.distribution.main.PolicyDistributionException;
+import org.onap.policy.distribution.main.parameters.DistributionParameterGroup;
+import org.onap.policy.distribution.main.parameters.DistributionParameterHandler;
+
+/**
+ * This class initiates ONAP Policy Framework policy distribution.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class Main {
+    private static final Logger LOGGER = FlexLogger.getLogger(Main.class);
+
+    // The policy distribution Activator that activates the policy distribution service
+    private DistributionActivator activator;
+
+    // The parameters read in from JSON
+    private DistributionParameterGroup parameterGroup;
+
+    /**
+     * Instantiates the policy distribution service.
+     *
+     * @param args the command line arguments
+     */
+    public Main(final String[] args) {
+        final String argumentString = Arrays.toString(args);
+        LOGGER.info("Starting policy distribution service with arguments - " + argumentString);
+
+        // Check the arguments
+        final DistributionCommandLineArguments arguments = new DistributionCommandLineArguments();
+        try {
+            // The arguments return a string if there is a message to print and we should exit
+            final String argumentMessage = arguments.parse(args);
+            if (argumentMessage != null) {
+                LOGGER.info(argumentMessage);
+                return;
+            }
+
+            // Validate that the arguments are sane
+            arguments.validate();
+        } catch (final PolicyDistributionException e) {
+            LOGGER.error("start of policy distribution service failed", e);
+            return;
+        }
+
+        // Read the parameters
+        try {
+            parameterGroup = new DistributionParameterHandler().getParameters(arguments);
+        } catch (final Exception e) {
+            LOGGER.error("start of policy distribution service failed", e);
+            return;
+        }
+
+        // Now, create the activator for the policy distribution service
+        activator = new DistributionActivator(parameterGroup);
+
+        // Start the activator
+        try {
+            activator.initialize();
+        } catch (final PolicyDistributionException e) {
+            LOGGER.error("start of policy distribution service failed, used parameters are " + Arrays.toString(args),
+                    e);
+            return;
+        }
+
+        // Add a shutdown hook to shut everything down in an orderly manner
+        Runtime.getRuntime().addShutdownHook(new PolicyDistributionShutdownHookClass());
+        LOGGER.info("Started policy distribution service");
+    }
+
+    /**
+     * Get the parameters specified in JSON.
+     *
+     * @return the parameters
+     */
+    public DistributionParameterGroup getParameters() {
+        return parameterGroup;
+    }
+
+    /**
+     * Shut down Execution.
+     *
+     * @throws PolicyDistributionException on shutdown errors
+     */
+    public void shutdown() throws PolicyDistributionException {
+        // clear the parameterGroup variable
+        parameterGroup = null;
+
+        // clear the distribution activator
+        if (activator != null) {
+            activator.terminate();
+        }
+    }
+
+    /**
+     * The Class PolicyDistributionShutdownHookClass terminates the policy distribution service when its run method is
+     * called.
+     */
+    private class PolicyDistributionShutdownHookClass extends Thread {
+        /*
+         * (non-Javadoc)
+         *
+         * @see java.lang.Runnable#run()
+         */
+        @Override
+        public void run() {
+            try {
+                // Shutdown the policy distribution service and wait for everything to stop
+                activator.terminate();
+            } catch (final PolicyDistributionException e) {
+                LOGGER.warn("error occured during shut down of the policy distribution service", e);
+            }
+        }
+    }
+
+    /**
+     * The main method.
+     *
+     * @param args the arguments
+     */
+    public static void main(final String[] args) {
+        new Main(args);
+    }
+}