| /** |
| * 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.metron.reference.lookup.accesstracker; |
| |
| import com.google.common.base.Function; |
| import com.google.common.collect.Iterables; |
| import org.apache.hadoop.hbase.client.*; |
| import org.apache.hadoop.hbase.util.Bytes; |
| |
| import javax.annotation.Nullable; |
| import java.io.*; |
| |
| public enum AccessTrackerUtil { |
| INSTANCE; |
| |
| public static byte[] COLUMN = Bytes.toBytes("v"); |
| |
| public AccessTracker deserializeTracker(byte[] bytes) throws IOException, ClassNotFoundException { |
| ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(bytes)); |
| return (AccessTracker) ois.readObject(); |
| } |
| public byte[] serializeTracker(AccessTracker tracker) throws IOException { |
| ByteArrayOutputStream bos = new ByteArrayOutputStream(); |
| ObjectOutputStream oos = new ObjectOutputStream(bos); |
| oos.writeObject(tracker); |
| oos.flush(); |
| oos.close(); |
| return bos.toByteArray(); |
| } |
| |
| |
| public void persistTracker(HTableInterface accessTrackerTable, String columnFamily, PersistentAccessTracker.AccessTrackerKey key, AccessTracker underlyingTracker) throws IOException { |
| Put put = new Put(key.toRowKey()); |
| put.add(Bytes.toBytes(columnFamily), COLUMN, serializeTracker(underlyingTracker)); |
| accessTrackerTable.put(put); |
| } |
| |
| public Iterable<AccessTracker> loadAll(HTableInterface accessTrackerTable, final String columnFamily, final String name, final long earliest) throws IOException { |
| Scan scan = new Scan(PersistentAccessTracker.AccessTrackerKey.getTimestampScanKey(name, earliest)); |
| ResultScanner scanner = accessTrackerTable.getScanner(scan); |
| return Iterables.transform(scanner, new Function<Result, AccessTracker>() { |
| |
| @Nullable |
| @Override |
| public AccessTracker apply(@Nullable Result result) { |
| try { |
| return deserializeTracker(result.getValue(Bytes.toBytes(columnFamily), COLUMN)); |
| } catch (Exception e) { |
| throw new RuntimeException("Unable to deserialize " + name + " @ " + earliest); |
| } |
| } |
| }); |
| } |
| |
| |
| public AccessTracker loadAll(Iterable<AccessTracker> trackers) throws IOException, ClassNotFoundException { |
| AccessTracker tracker = null; |
| for(AccessTracker t : trackers) { |
| if(tracker == null) { |
| tracker = t; |
| } |
| else { |
| tracker = tracker.union(t); |
| } |
| } |
| return tracker; |
| } |
| } |