1 files changed, 82 insertions, 0 deletions
diff --git a/src/main/java/org/openecomp/dcae/inventory/exceptions/mappers/DBIExceptionMapper.java b/src/main/java/org/openecomp/dcae/inventory/exceptions/mappers/DBIExceptionMapper.java
new file mode 100644
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--- /dev/null
+++ b/src/main/java/org/openecomp/dcae/inventory/exceptions/mappers/DBIExceptionMapper.java
@@ -0,0 +1,82 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * dcae-inventory
+ * ================================================================================
+ * Copyright (C) 2017 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.openecomp.dcae.inventory.exceptions.mappers;
+
+import org.openecomp.dcae.inventory.daos.InventoryDAOManager;
+import io.swagger.api.ApiResponseMessage;
+import org.skife.jdbi.v2.exceptions.DBIException;
+import org.skife.jdbi.v2.exceptions.UnableToCreateStatementException;
+import org.skife.jdbi.v2.exceptions.UnableToExecuteStatementException;
+import org.skife.jdbi.v2.exceptions.UnableToObtainConnectionException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.ws.rs.core.Response;
+import javax.ws.rs.ext.ExceptionMapper;
+
+/**
+ * Created by mhwang on 3/6/17.
+ *
+ * Responsible for handling DBIExceptions for Inventory which are raised by database client calls
+ * http://jdbi.org/apidocs/org/skife/jdbi/v2/exceptions/DBIException.html
+ *
+ * This class is intended to be extended to match on specific exceptions that are derived from DBIException
+ */
+public class DBIExceptionMapper<T extends DBIException> implements ExceptionMapper<T> {
+
+    private final static Logger LOG = LoggerFactory.getLogger(DBIExceptionMapper.class);
+
+    /**
+     * Upon a DBIException, this handler will attempt to re-initialize the Inventory's database connection
+     * and craft a specific message telling the client what to do.
+     *
+     * @param exception Derived class of DBIException
+     * @return Returns a Response with a status code of 502 with an ApiResponseMessage object
+     */
+    @Override
+    public Response toResponse(T exception) {
+        LOG.error("", exception);
+        StringBuilder clientMessage = new StringBuilder("There is a database issue.");
+
+        try {
+            InventoryDAOManager.getInstance().initialize();
+            clientMessage.append(" Connection has been successfully reset. Please try again.");
+        } catch(Exception e) {
+            LOG.error(String.format("Failed to re-initialize database connection: %s", e.getMessage()));
+            clientMessage.append(" Connection reset attempt has failed. Please try again soon.");
+        }
+
+        ApiResponseMessage response = new ApiResponseMessage(ApiResponseMessage.ERROR, clientMessage.toString());
+        return Response.status(Response.Status.BAD_GATEWAY).entity(response).build();
+    }
+
+    // Here are the handlers for specific derived DBIException
+
+    public final static class UnableToObtainConnectionExceptionMapper extends DBIExceptionMapper<UnableToObtainConnectionException> {
+    }
+
+    public final static class UnableToCreateStatementExceptionMapper extends DBIExceptionMapper<UnableToCreateStatementException> {
+    }
+
+    public final static class UnableToExecuteStatementExceptionMapper extends DBIExceptionMapper<UnableToExecuteStatementException> {
+    }
+
+}