ranger-hbase-plugin-shim/src/main/java/org/apache/hadoop/hbase/security/access/RangerAccessControlLists.java

/**
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
package org.apache.hadoop.hbase.security.access;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import org.apache.hadoop.hbase.TableExistsException;
import org.apache.hadoop.hbase.master.MasterServices;
import org.apache.log4j.Logger;


public class RangerAccessControlLists {
	
	private static final Logger LOG = Logger.getLogger(RangerAccessControlLists.class);
	
	public static void init(MasterServices master) throws IOException {

		Class<AccessControlLists> accessControlListsClass = AccessControlLists.class;
		String cName = accessControlListsClass.getName();

		Class<?>[] params = new Class[1];
		params[0] = MasterServices.class;
		
		for (String mname : new String[] { "init", "createACLTable" } ) {
			try {
				try {
					Method m = accessControlListsClass.getDeclaredMethod(mname, params);
					if (m != null) {
						try {
							
							try {
								m.invoke(null, master);
								logInfo("Execute method name [" + mname + "] in Class [" +  cName + "] is successful.");
							} catch (InvocationTargetException e) {
								Throwable cause = e;
								boolean tableExistsExceptionFound = false;
								if  (e != null) { 	
									Throwable ecause = e.getTargetException();
									if (ecause != null) {
										cause = ecause;
										if (ecause instanceof TableExistsException) {
											tableExistsExceptionFound = true;
										}
									}
								}
								if (! tableExistsExceptionFound) {
									logError("Unable to execute the method [" + mname + "] on [" + cName + "] due to exception", cause);
									throw new IOException(cause);
								}
							}
							return;
						} catch (IllegalArgumentException e) {
							logError("Unable to execute method name [" + mname + "] in Class [" +  cName + "].", e);
							throw new IOException(e);
						} catch (IllegalAccessException e) {
							logError("Unable to execute method name [" + mname + "] in Class [" +  cName + "].", e);
							throw new IOException(e);
						}
					}
				}
				catch(NoSuchMethodException nsme) {
					logInfo("Unable to get method name [" + mname + "] in Class [" +  cName + "]. Ignoring the exception");
				}
			} catch (SecurityException e) {
				logError("Unable to get method name [" + mname + "] in Class [" +  cName + "].", e);
				throw new IOException(e);
			}
		}
		throw new IOException("Unable to initialize() [" + cName + "]");
	}
	
	
	private static void logInfo(String msg) {
		// System.out.println(msg);
		LOG.info(msg);
	}

	private static void logError(String msg, Throwable t) {
//		System.err.println(msg);
//		if (t != null) {
//			t.printStackTrace(System.err);
//		}
		LOG.error(msg, t);
	}

}