dianfu commented on a change in pull request #7110: [FLINK-8159] [cep] Pattern(Flat)SelectFunctions should support RichFunction interface URL: https://github.com/apache/flink/pull/7110#discussion_r235244088
########## File path: flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/CepRuntimeContext.java ########## @@ -0,0 +1,196 @@ +/* + * 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.flink.cep; + +import org.apache.flink.api.common.ExecutionConfig; +import org.apache.flink.api.common.accumulators.Accumulator; +import org.apache.flink.api.common.accumulators.DoubleCounter; +import org.apache.flink.api.common.accumulators.Histogram; +import org.apache.flink.api.common.accumulators.IntCounter; +import org.apache.flink.api.common.accumulators.LongCounter; +import org.apache.flink.api.common.cache.DistributedCache; +import org.apache.flink.api.common.functions.BroadcastVariableInitializer; +import org.apache.flink.api.common.functions.RuntimeContext; +import org.apache.flink.api.common.state.AggregatingState; +import org.apache.flink.api.common.state.AggregatingStateDescriptor; +import org.apache.flink.api.common.state.FoldingState; +import org.apache.flink.api.common.state.FoldingStateDescriptor; +import org.apache.flink.api.common.state.ListState; +import org.apache.flink.api.common.state.ListStateDescriptor; +import org.apache.flink.api.common.state.MapState; +import org.apache.flink.api.common.state.MapStateDescriptor; +import org.apache.flink.api.common.state.ReducingState; +import org.apache.flink.api.common.state.ReducingStateDescriptor; +import org.apache.flink.api.common.state.ValueState; +import org.apache.flink.api.common.state.ValueStateDescriptor; +import org.apache.flink.metrics.MetricGroup; + +import java.io.Serializable; +import java.util.List; +import java.util.Map; + +/** + * A wrapper class for pattern select function and iterative condition function's {@link RuntimeContext}. + * The runtime context only supports basic operations. Consequently, state access, accumulators, + * broadcast variables and the distributed cache are disabled. + */ +public class CepRuntimeContext implements RuntimeContext { + + private final RuntimeContext runtimeContext; + + public CepRuntimeContext(RuntimeContext runtimeContext) { + this.runtimeContext = runtimeContext; + } + + @Override + public String getTaskName() { + return runtimeContext.getTaskName(); + } + + @Override + public MetricGroup getMetricGroup() { + return runtimeContext.getMetricGroup(); + } + + @Override + public int getNumberOfParallelSubtasks() { + return runtimeContext.getNumberOfParallelSubtasks(); + } + + @Override + public int getMaxNumberOfParallelSubtasks() { + return runtimeContext.getMaxNumberOfParallelSubtasks(); + } + + @Override + public int getIndexOfThisSubtask() { + return runtimeContext.getIndexOfThisSubtask(); + } + + @Override + public int getAttemptNumber() { + return runtimeContext.getAttemptNumber(); + } + + @Override + public String getTaskNameWithSubtasks() { + return runtimeContext.getTaskNameWithSubtasks(); + } + + @Override + public ExecutionConfig getExecutionConfig() { + return runtimeContext.getExecutionConfig(); + } + + @Override + public ClassLoader getUserCodeClassLoader() { + return runtimeContext.getUserCodeClassLoader(); + } + + // ----------------------------------------------------------------------------------- + // Unsupported operations + // ----------------------------------------------------------------------------------- + + @Override + public <V, A extends Serializable> void addAccumulator( + String name, Accumulator<V, A> accumulator) { + throw new UnsupportedOperationException("Accumulators are not supported."); + } + + @Override + public <V, A extends Serializable> Accumulator<V, A> getAccumulator(String name) { + throw new UnsupportedOperationException("Accumulators are not supported."); + } + + @Override + public Map<String, Accumulator<?, ?>> getAllAccumulators() { + throw new UnsupportedOperationException("Accumulators are not supported."); + } + + @Override + public IntCounter getIntCounter(String name) { + throw new UnsupportedOperationException("Int counters are not supported."); + } + + @Override + public LongCounter getLongCounter(String name) { + throw new UnsupportedOperationException("Long counters are not supported."); + } + + @Override + public DoubleCounter getDoubleCounter(String name) { + throw new UnsupportedOperationException("Double counters are not supported."); Review comment: +1 to make the minimal changes at present and we can expose more functionalities in the future if needed. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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