| /** |
| * 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.apex.malhar.lib.join; |
| |
| import java.lang.reflect.Array; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.apex.malhar.lib.window.impl.KeyedWindowedMergeOperatorImpl; |
| import org.apache.apex.malhar.lib.window.impl.WindowedMergeOperatorImpl; |
| import org.apache.commons.lang3.ClassUtils; |
| |
| import com.datatorrent.api.Context; |
| import com.datatorrent.api.DefaultInputPort; |
| import com.datatorrent.api.DefaultOutputPort; |
| import com.datatorrent.api.Operator; |
| import com.datatorrent.api.StreamCodec; |
| import com.datatorrent.api.annotation.InputPortFieldAnnotation; |
| import com.datatorrent.api.annotation.OutputPortFieldAnnotation; |
| import com.datatorrent.lib.util.PojoUtils; |
| |
| /** |
| * Concrete implementation of AbstractManagedStateInnerJoinOperator and receives objects from both streams. |
| * |
| * @displayName POJO Inner Join Operator |
| * @tags join |
| * |
| * @deprecated This operator is deprecated and would be removed in the following major release. <br/> |
| * Please use {@link WindowedMergeOperatorImpl} or {@link KeyedWindowedMergeOperatorImpl} for join use cases. |
| * |
| * @since 3.5.0 |
| */ |
| @Deprecated |
| @org.apache.hadoop.classification.InterfaceStability.Evolving |
| public class POJOInnerJoinOperator extends AbstractManagedStateInnerJoinOperator<Object,Object> implements Operator.ActivationListener<Context> |
| { |
| private transient long timeIncrement; |
| private transient FieldObjectMap[] inputFieldObjects = (FieldObjectMap[])Array.newInstance(FieldObjectMap.class, 2); |
| protected transient Class<?> outputClass; |
| private long time = System.currentTimeMillis(); |
| |
| @OutputPortFieldAnnotation(schemaRequired = true) |
| public final transient DefaultOutputPort<Object> outputPort = new DefaultOutputPort<Object>() |
| { |
| @Override |
| public void setup(Context.PortContext context) |
| { |
| outputClass = context.getValue(Context.PortContext.TUPLE_CLASS); |
| } |
| }; |
| |
| @InputPortFieldAnnotation(schemaRequired = true) |
| public transient DefaultInputPort<Object> input1 = new DefaultInputPort<Object>() |
| { |
| @Override |
| public void setup(Context.PortContext context) |
| { |
| inputFieldObjects[0].inputClass = context.getValue(Context.PortContext.TUPLE_CLASS); |
| } |
| |
| @Override |
| public void process(Object tuple) |
| { |
| processTuple(tuple,true); |
| } |
| |
| @Override |
| public StreamCodec<Object> getStreamCodec() |
| { |
| return getInnerJoinStreamCodec(true); |
| } |
| }; |
| |
| @InputPortFieldAnnotation(schemaRequired = true) |
| public transient DefaultInputPort<Object> input2 = new DefaultInputPort<Object>() |
| { |
| @Override |
| public void setup(Context.PortContext context) |
| { |
| inputFieldObjects[1].inputClass = context.getValue(Context.PortContext.TUPLE_CLASS); |
| } |
| |
| @Override |
| public void process(Object tuple) |
| { |
| processTuple(tuple,false); |
| } |
| |
| @Override |
| public StreamCodec<Object> getStreamCodec() |
| { |
| return getInnerJoinStreamCodec(false); |
| } |
| }; |
| |
| @Override |
| public void setup(Context.OperatorContext context) |
| { |
| timeIncrement = context.getValue(Context.OperatorContext.APPLICATION_WINDOW_COUNT) * |
| context.getValue(Context.DAGContext.STREAMING_WINDOW_SIZE_MILLIS); |
| super.setup(context); |
| for (int i = 0; i < 2; i++) { |
| inputFieldObjects[i] = new FieldObjectMap(); |
| } |
| } |
| |
| /** |
| * Extract the time value from the given tuple |
| * @param tuple given tuple |
| * @param isStream1Data Specifies whether the given tuple belongs to stream1 or not. |
| * @return the time in milliseconds |
| */ |
| @Override |
| public long extractTime(Object tuple, boolean isStream1Data) |
| { |
| return timeFields == null ? time : (long)(isStream1Data ? inputFieldObjects[0].timeFieldGet.get(tuple) : |
| inputFieldObjects[1].timeFieldGet.get(tuple)); |
| } |
| |
| /** |
| * Create getters for the key and time fields and setters for the include fields. |
| */ |
| private void generateSettersAndGetters() |
| { |
| for (int i = 0; i < 2; i++) { |
| Class inputClass = inputFieldObjects[i].inputClass; |
| try { |
| inputFieldObjects[i].keyGet = PojoUtils.createGetter(inputClass, keyFieldExpressions.get(i), Object.class); |
| if (timeFields != null && timeFields.size() == 2) { |
| Class timeField = ClassUtils.primitiveToWrapper(inputClass.getDeclaredField(timeFields.get(i)).getType()); |
| inputFieldObjects[i].timeFieldGet = PojoUtils.createGetter(inputClass, timeFields.get(i), timeField); |
| } |
| for (int j = 0; j < includeFields[i].length; j++) { |
| Class inputField = ClassUtils.primitiveToWrapper(inputClass.getDeclaredField(includeFields[i][j]).getType()); |
| Class outputField = ClassUtils.primitiveToWrapper(outputClass.getDeclaredField(includeFields[i][j]).getType()); |
| if (inputField != outputField) { |
| continue; |
| } |
| inputFieldObjects[i].fieldMap.put(PojoUtils.createGetter(inputClass, includeFields[i][j], inputField), |
| PojoUtils.createSetter(outputClass, includeFields[i][j], outputField)); |
| } |
| } catch (NoSuchFieldException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| |
| /** |
| * Extract the key value from the given tuple |
| * @param tuple given tuple |
| * @param isStream1Data Specifies whether the given tuple belongs to stream1 or not. |
| * @return the key object |
| */ |
| @Override |
| public Object extractKey(Object tuple, boolean isStream1Data) |
| { |
| return isStream1Data ? inputFieldObjects[0].keyGet.get(tuple) : |
| inputFieldObjects[1].keyGet.get(tuple); |
| } |
| |
| /** |
| * Merge the given tuples |
| * @param tuple1 tuple belongs to stream1 |
| * @param tuple2 tuple belongs to stream1 |
| * @return the merged output object |
| */ |
| @Override |
| public Object mergeTuples(Object tuple1, Object tuple2) |
| { |
| Object o; |
| try { |
| o = outputClass.newInstance(); |
| for (Map.Entry<PojoUtils.Getter,PojoUtils.Setter> g: inputFieldObjects[0].fieldMap.entrySet()) { |
| g.getValue().set(o, g.getKey().get(tuple1)); |
| } |
| for (Map.Entry<PojoUtils.Getter,PojoUtils.Setter> g: inputFieldObjects[1].fieldMap.entrySet()) { |
| g.getValue().set(o, g.getKey().get(tuple2)); |
| } |
| } catch (InstantiationException | IllegalAccessException e) { |
| throw new RuntimeException(e); |
| } |
| return o; |
| } |
| |
| /** |
| * Emit the given tuple through the outputPort |
| * @param tuple given tuple |
| */ |
| @Override |
| public void emitTuple(Object tuple) |
| { |
| outputPort.emit(tuple); |
| } |
| |
| @Override |
| public void activate(Context context) |
| { |
| generateSettersAndGetters(); |
| } |
| |
| @Override |
| public void deactivate() |
| { |
| } |
| |
| @Override |
| public void endWindow() |
| { |
| super.endWindow(); |
| time += timeIncrement; |
| } |
| |
| /** |
| * Returns the streamcodec for the streams |
| * @param isStream1data Specifies whether the codec needs for stream1 or stream2. |
| * @return the object of JoinStreamCodec |
| */ |
| private StreamCodec<Object> getInnerJoinStreamCodec(boolean isStream1data) |
| { |
| if (isStream1data) { |
| return new JoinStreamCodec(getLeftKeyExpression()); |
| } |
| return new JoinStreamCodec(getRightKeyExpression()); |
| } |
| |
| private class FieldObjectMap |
| { |
| public Class<?> inputClass; |
| public PojoUtils.Getter keyGet; |
| public PojoUtils.Getter timeFieldGet; |
| public Map<PojoUtils.Getter,PojoUtils.Setter> fieldMap; |
| |
| public FieldObjectMap() |
| { |
| fieldMap = new HashMap<>(); |
| } |
| } |
| } |