1 files changed, 164 insertions, 0 deletions
diff --git a/aai-service/provider/src/main/java/org/onap/ccsdk/sli/adaptors/aai/AAIServiceProvider.java b/aai-service/provider/src/main/java/org/onap/ccsdk/sli/adaptors/aai/AAIServiceProvider.java
new file mode 100755
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--- /dev/null
+++ b/aai-service/provider/src/main/java/org/onap/ccsdk/sli/adaptors/aai/AAIServiceProvider.java
@@ -0,0 +1,164 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * openECOMP : SDN-C
+ * ================================================================================
+ * 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.ccsdk.sli.adaptors.aai;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.util.Optional;
+import java.util.Properties;
+import java.util.Vector;
+
+import org.onap.ccsdk.sli.core.utils.JREFileResolver;
+import org.onap.ccsdk.sli.core.utils.KarafRootFileResolver;
+import org.onap.ccsdk.sli.core.utils.PropertiesFileResolver;
+import org.onap.ccsdk.sli.core.utils.common.BundleContextFileResolver;
+import org.onap.ccsdk.sli.core.utils.common.CoreDefaultFileResolver;
+import org.onap.ccsdk.sli.core.utils.common.SdncConfigEnvVarFileResolver;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Responsible for determining the properties file to use and instantiating the <code>DBResourceManager</code>
+ * Service.  The priority for properties file resolution is as follows:
+ *
+ * <ol>
+ *     <li>A directory identified by the system environment variable <code>SDNC_CONFIG_DIR</code></li>
+ *     <li>The default directory <code>DEFAULT_DBLIB_PROP_DIR</code></li>
+ *     <li>A directory identified by the JRE argument <code>dblib.properties</code></li>
+ *     <li>A <code>dblib.properties</code> file located in the karaf root directory</li>
+ * </ol>
+ */
+public class AAIServiceProvider implements UtilsProvider {
+
+    private static final Logger LOG = LoggerFactory.getLogger(AAIServiceProvider.class);
+
+    /**
+     * The name of the properties file for database configuration
+     */
+    private static final String AAISEERVICE_PROP_FILE_NAME = "aaiclient.properties";
+
+    /**
+     * A prioritized list of strategies for resolving dblib properties files.
+     */
+    private Vector<PropertiesFileResolver> dblibPropertiesFileResolvers = new Vector();
+
+    /**
+     * The configuration properties for the db connection.
+     */
+    private Properties properties;
+
+    /**
+     * Set up the prioritized list of strategies for resolving dblib properties files.
+     */
+    public AAIServiceProvider() {
+        dblibPropertiesFileResolvers.add(new JREFileResolver(
+            "Using property file (1) from JRE argument", AAIServiceProvider.class
+        ));
+        dblibPropertiesFileResolvers.add(new BundleContextFileResolver(
+            "Using property file (1) from JRE argument", AAIServiceProvider.class
+        ));
+        dblibPropertiesFileResolvers.add(new SdncConfigEnvVarFileResolver(
+            "Using property file (2) from environment variable"
+        ));
+        dblibPropertiesFileResolvers.add(new KarafRootFileResolver(
+            "Using property file (4) from karaf root", this
+        ));
+        dblibPropertiesFileResolvers.add(new CoreDefaultFileResolver(
+            "Using property file (3) from default directory"
+        ));
+
+        // determines properties file as according to the priority described in the class header comment
+        final File propertiesFile = determinePropertiesFile();
+        if (propertiesFile != null) {
+            try(FileInputStream fileInputStream = new FileInputStream(propertiesFile)) {
+                properties = new Properties();
+                properties.load(fileInputStream);
+            } catch (final IOException e) {
+                LOG.error("Failed to load properties for file: {}", propertiesFile.toString(),
+                        new AAIServiceException("Failed to load properties for file: "
+                                + propertiesFile.toString(), e));
+            }
+        }
+    }
+
+    /**
+     * Extract db config properties.
+     *
+     * @return the db config properties
+     */
+    public Properties getProperties() {
+        return properties;
+    }
+
+    /**
+     * Reports the method chosen for properties resolution to the <code>Logger</code>.
+     *
+     * @param message Some user friendly message
+     * @param fileOptional The file location of the chosen properties file
+     * @return the file location of the chosen properties file
+     */
+    private static File reportSuccess(final String message, final Optional<File> fileOptional) {
+        if(fileOptional.isPresent()) {
+            final File file = fileOptional.get();
+            LOG.info("{} {}", message, file.getPath());
+            return file;
+        }
+        return null;
+    }
+
+    /**
+     * Reports fatal errors.  This is the case in which no properties file could be found.
+     *
+     * @param message An appropriate fatal error message
+     * @param dblibConfigurationException An exception describing what went wrong during resolution
+     */
+    private static void reportFailure(final String message,
+                                      final AAIServiceException dblibConfigurationException) {
+
+        LOG.error("{}", message, dblibConfigurationException);
+    }
+
+    /**
+     * Determines the dblib properties file to use based on the following priority:
+     * <ol>
+     *     <li>A directory identified by the system environment variable <code>SDNC_CONFIG_DIR</code></li>
+     *     <li>The default directory <code>DEFAULT_DBLIB_PROP_DIR</code></li>
+     *     <li>A directory identified by the JRE argument <code>dblib.properties</code></li>
+     *     <li>A <code>dblib.properties</code> file located in the karaf root directory</li>
+     * </ol>
+     */
+    File determinePropertiesFile() {
+
+        for (final PropertiesFileResolver dblibPropertiesFileResolver : dblibPropertiesFileResolvers) {
+            final Optional<File> fileOptional = dblibPropertiesFileResolver.resolveFile(AAISEERVICE_PROP_FILE_NAME);
+            if (fileOptional.isPresent()) {
+                return reportSuccess(dblibPropertiesFileResolver.getSuccessfulResolutionMessage(), fileOptional);
+            }
+        }
+
+        reportFailure("Missing configuration properties resource(3)",
+                new AAIServiceException("Missing configuration properties resource(3): "
+                        + AAISEERVICE_PROP_FILE_NAME));
+        return null;
+    }
+}