/*
* 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 gobblin.instrumented.qualitychecker;
import java.io.IOException;
import com.google.common.base.Optional;
import gobblin.configuration.State;
import gobblin.instrumented.Instrumented;
import gobblin.metrics.MetricContext;
import gobblin.qualitychecker.row.RowLevelPolicy;
import gobblin.util.Decorator;
import gobblin.util.DecoratorUtils;
/**
* Decorator that automatically instruments {@link gobblin.qualitychecker.row.RowLevelPolicy}.
* Handles already instrumented {@link gobblin.instrumented.qualitychecker.InstrumentedRowLevelPolicy}
* appropriately to avoid double metric reporting.
*/
public class InstrumentedRowLevelPolicyDecorator extends InstrumentedRowLevelPolicyBase implements Decorator {
private RowLevelPolicy embeddedPolicy;
private boolean isEmbeddedInstrumented;
public InstrumentedRowLevelPolicyDecorator(RowLevelPolicy policy) {
super(policy.getTaskState(), policy.getType(),
Optional.<Class<?>> of(DecoratorUtils.resolveUnderlyingObject(policy).getClass()));
this.embeddedPolicy = policy;
this.isEmbeddedInstrumented = Instrumented.isLineageInstrumented(policy);
}
@Override
public MetricContext getMetricContext() {
return this.isEmbeddedInstrumented ? ((InstrumentedRowLevelPolicyBase) this.embeddedPolicy).getMetricContext()
: super.getMetricContext();
}
@Override
public Result executePolicy(Object record) {
return this.isEmbeddedInstrumented ? executePolicyImpl(record) : super.executePolicy(record);
}
@Override
public Result executePolicyImpl(Object record) {
return this.embeddedPolicy.executePolicy(record);
}
@Override
public void close() throws IOException {
this.embeddedPolicy.close();
}
@Override
public Object getDecoratedObject() {
return this.embeddedPolicy;
}
@Override
public State getFinalState() {
return this.embeddedPolicy.getFinalState();
}
}