1 files changed, 83 insertions, 0 deletions
diff --git a/dmaap-bc/src/main/java/org/onap/dmaap/dbcapi/database/ConnWrapper.java b/dmaap-bc/src/main/java/org/onap/dmaap/dbcapi/database/ConnWrapper.java
new file mode 100644
index 0000000..2317fe4
--- /dev/null
+++ b/dmaap-bc/src/main/java/org/onap/dmaap/dbcapi/database/ConnWrapper.java
@@ -0,0 +1,83 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * org.onap.dmaap
+ * ================================================================================
+ * 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.onap.dmaap.dbcapi.database;
+
+import java.sql.*;
+
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+
+
+public abstract class ConnWrapper<T, U>	{
+	EELFLogger logger = EELFManager.getInstance().getLogger( ConnWrapper.class );
+	protected Connection c;
+	protected PreparedStatement ps;
+	protected ResultSet	rs;
+	protected abstract T run(U u) throws Exception;
+	public T protect(ConnectionFactory cf, U u) {
+		try {
+			try {
+				return(attempt(cf, u, false));
+			} catch (SQLException sqle) {
+				logger.error("Error", sqle);
+				return(attempt(cf, u, true));
+			}
+		} catch (RuntimeException rte) {
+			throw rte;
+		} catch (Exception e) {
+			throw new DBException(e);
+		}
+	}
+	private T attempt(ConnectionFactory cf, U u, boolean fresh) throws Exception {
+		c = null;
+		ps = null;
+		rs = null;
+		try {
+			c = cf.get(fresh);
+			T ret = run(u);
+			cf.release(c);
+			c = null;
+			return(ret);
+		} finally {
+			if (rs != null) { 
+				try { 
+					rs.close(); 
+				} catch (Exception e) {
+					logger.error("Error", e);
+				}}
+			rs = null;
+			if (ps != null) { 
+				try { 
+					ps.close(); 
+				} catch (Exception e) {
+					logger.error("Error", e);
+				}}
+			ps = null;
+			if (c != null) { 
+				try { 
+					c.close(); 
+				} catch (Exception e) {
+					logger.error("Error", e);
+				}}
+			c = null;
+		}
+	}
+}