add SDC client and reception handle

[multicloud/framework.git] / artifactbroker / plugins / reception-plugins / src / main / java / org / onap / policy / distribution / reception / handling / sdc / FileSystemReceptionHandler.java

diff --git a/artifactbroker/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/handling/sdc/FileSystemReceptionHandler.java b/artifactbroker/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/handling/sdc/FileSystemReceptionHandler.java
new file mode 100644 (file)
index 0000000..941cdd6
--- /dev/null
+++ b/artifactbroker/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/handling/sdc/FileSystemReceptionHandler.java
@@ -0,0 +1,120 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2018 Intel Corp. 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.sdc;
+
+import static java.nio.file.StandardWatchEventKinds.ENTRY_CREATE;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.FileSystems;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.WatchEvent;
+import java.nio.file.WatchKey;
+import java.nio.file.WatchService;
+
+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.model.Csar;
+import org.onap.policy.distribution.reception.decoding.PolicyDecodingException;
+import org.onap.policy.distribution.reception.handling.AbstractReceptionHandler;
+
+/**
+ * Handles reception of inputs from File System which can be used to decode policies.
+ */
+public class FileSystemReceptionHandler extends AbstractReceptionHandler {
+    private boolean running = false;
+    private static final Logger LOGGER = FlexLogger.getLogger(FileSystemReceptionHandler.class);
+
+    @Override
+    protected void initializeReception(final String parameterGroupName) {
+        LOGGER.debug("FileSystemReceptionHandler init...");
+        try {
+            final FileSystemReceptionHandlerConfigurationParameterGroup handlerParameters =
+                                    ParameterService.get(parameterGroupName);
+            main(handlerParameters.getWatchPath());
+        } catch (final Exception ex) {
+            LOGGER.error(ex);
+        }
+        running = false;
+        LOGGER.debug("FileSystemReceptionHandler main loop exited...");
+    }
+
+    @Override
+    public void destroy() {
+        // Tear down subscription etc
+        running = false;
+    }
+
+    public boolean isRunning() {
+        return running;
+    }
+
+    /**
+     * Main entry point.
+     * 
+     * @param watchPath Path to watch
+     */
+    public void main(String watchPath) throws IOException {
+        try (final WatchService watcher = FileSystems.getDefault().newWatchService()) {
+            final Path dir = Paths.get(watchPath);
+            dir.register(watcher, ENTRY_CREATE);
+            LOGGER.debug("Watch Service registered for dir: " + dir.getFileName());
+            startMainLoop(watcher, dir);
+        } catch (final InterruptedException ex) {
+            LOGGER.debug(ex);
+            Thread.currentThread().interrupt();
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    protected void startMainLoop(WatchService watcher, Path dir) throws InterruptedException {
+        WatchKey key;
+        running = true;
+        while (running) {
+            key = watcher.take();
+
+            for (final WatchEvent<?> event : key.pollEvents()) {
+                final WatchEvent<Path> ev = (WatchEvent<Path>) event;
+                final Path fileName = ev.context();
+                LOGGER.debug("new CSAR found: " + fileName);
+                createPolicyInputAndCallHandler(dir.toString() + File.separator + fileName.toString());
+                LOGGER.debug("CSAR complete: " + fileName);
+            }
+            final boolean valid = key.reset();
+            if (!valid) {
+                LOGGER.error("Watch key no longer valid!");
+                break;
+            }
+        }
+    }
+
+    protected void createPolicyInputAndCallHandler(final String fileName) {
+        try {
+            final Csar csarObject = new Csar(fileName);
+            inputReceived(csarObject);
+        } catch (final PolicyDecodingException ex) {
+            LOGGER.error(ex);
+        }
+    }
+}