| /** |
| * 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.enrichment.converter; |
| |
| import com.google.common.hash.HashFunction; |
| import com.google.common.hash.Hasher; |
| import com.google.common.hash.Hashing; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.metron.enrichment.lookup.LookupKey; |
| |
| import java.io.*; |
| |
| public class EnrichmentKey implements LookupKey { |
| private static final int SEED = 0xDEADBEEF; |
| private static final int HASH_PREFIX_SIZE=16; |
| ThreadLocal<HashFunction> hFunction= new ThreadLocal<HashFunction>() { |
| @Override |
| protected HashFunction initialValue() { |
| return Hashing.murmur3_128(SEED); |
| } |
| }; |
| |
| public String indicator; |
| public String type; |
| |
| public EnrichmentKey() { |
| |
| } |
| public EnrichmentKey(String type, String indicator) { |
| this.indicator = indicator; |
| this.type = type; |
| } |
| |
| private byte[] typedIndicatorToBytes() throws IOException { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| DataOutputStream w = new DataOutputStream(baos); |
| w.writeUTF(type); |
| w.writeUTF(indicator); |
| w.flush(); |
| return baos.toByteArray(); |
| } |
| |
| @Override |
| public byte[] toBytes() { |
| byte[] indicatorBytes = new byte[0]; |
| try { |
| indicatorBytes = typedIndicatorToBytes(); |
| } catch (IOException e) { |
| throw new RuntimeException("Unable to convert type and indicator to bytes", e); |
| } |
| Hasher hasher = hFunction.get().newHasher(); |
| hasher.putBytes(Bytes.toBytes(indicator)); |
| byte[] prefix = hasher.hash().asBytes(); |
| byte[] val = new byte[indicatorBytes.length + prefix.length]; |
| int offset = 0; |
| System.arraycopy(prefix, 0, val, offset, prefix.length); |
| offset += prefix.length; |
| System.arraycopy(indicatorBytes, 0, val, offset, indicatorBytes.length); |
| return val; |
| } |
| |
| @Override |
| public void fromBytes(byte[] row) { |
| ByteArrayInputStream baos = new ByteArrayInputStream(row); |
| baos.skip(HASH_PREFIX_SIZE); |
| DataInputStream w = new DataInputStream(baos); |
| try { |
| type = w.readUTF(); |
| indicator = w.readUTF(); |
| } catch (IOException e) { |
| throw new RuntimeException("Unable to convert type and indicator from bytes", e); |
| } |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| |
| EnrichmentKey that = (EnrichmentKey) o; |
| |
| if (indicator != null ? !indicator.equals(that.indicator) : that.indicator != null) return false; |
| return type != null ? type.equals(that.type) : that.type == null; |
| |
| } |
| |
| @Override |
| public int hashCode() { |
| int result = indicator != null ? indicator.hashCode() : 0; |
| result = 31 * result + (type != null ? type.hashCode() : 0); |
| return result; |
| } |
| |
| @Override |
| public String toString() { |
| return "EnrichmentKey{" + |
| "indicator='" + indicator + '\'' + |
| ", type='" + type + '\'' + |
| '}'; |
| } |
| |
| @Override |
| public String getIndicator() { |
| return indicator; |
| } |
| |
| @Override |
| public void setIndicator(String indicator) { |
| this.indicator = indicator; |
| } |
| } |