| /* |
| * 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.streaming.tests; |
| |
| import org.apache.flink.api.common.functions.RichFlatMapFunction; |
| import org.apache.flink.api.common.state.KeyedStateStore; |
| import org.apache.flink.api.common.state.ListState; |
| import org.apache.flink.api.common.state.ListStateDescriptor; |
| import org.apache.flink.api.common.state.State; |
| import org.apache.flink.api.common.state.StateTtlConfig; |
| import org.apache.flink.api.common.typeutils.TypeSerializer; |
| import org.apache.flink.api.common.typeutils.base.LongSerializer; |
| import org.apache.flink.runtime.state.FunctionInitializationContext; |
| import org.apache.flink.runtime.state.FunctionSnapshotContext; |
| import org.apache.flink.streaming.api.checkpoint.CheckpointedFunction; |
| import org.apache.flink.streaming.tests.verify.TtlStateVerifier; |
| import org.apache.flink.streaming.tests.verify.TtlUpdateContext; |
| import org.apache.flink.streaming.tests.verify.TtlVerificationContext; |
| import org.apache.flink.streaming.tests.verify.ValueWithTs; |
| import org.apache.flink.util.Collector; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import javax.annotation.Nonnull; |
| |
| import java.io.Serializable; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.stream.Collectors; |
| import java.util.stream.StreamSupport; |
| |
| import static org.apache.flink.util.Preconditions.checkNotNull; |
| |
| /** |
| * Update state with TTL for each verifier. |
| * |
| * <p>This function for each verifier from {@link TtlStateVerifier#VERIFIERS} - creates state with |
| * TTL - creates state of previous updates for further verification against it - receives random |
| * state update - gets state value before update - updates state with random value - gets state |
| * value after update - checks if this update clashes with any previous updates - if clashes, clears |
| * state and recreate update - verifies last update against previous updates - emits verification |
| * context in case of failure |
| */ |
| class TtlVerifyUpdateFunction extends RichFlatMapFunction<TtlStateUpdate, String> |
| implements CheckpointedFunction { |
| private static final long serialVersionUID = 1L; |
| private static final Logger LOG = LoggerFactory.getLogger(TtlVerifyUpdateFunction.class); |
| |
| @Nonnull private final StateTtlConfig ttlConfig; |
| private final UpdateStat stat; |
| |
| private transient Map<String, State> states; |
| private transient Map<String, ListState<ValueWithTs<?>>> prevUpdatesByVerifierId; |
| |
| TtlVerifyUpdateFunction(@Nonnull StateTtlConfig ttlConfig, long reportStatAfterUpdatesNum) { |
| this.ttlConfig = ttlConfig; |
| this.stat = new UpdateStat(reportStatAfterUpdatesNum); |
| } |
| |
| @Override |
| public void flatMap(TtlStateUpdate updates, Collector<String> out) throws Exception { |
| for (TtlStateVerifier<?, ?> verifier : TtlStateVerifier.VERIFIERS) { |
| TtlVerificationContext<?, ?> verificationContext = |
| generateUpdateAndVerificationContext(updates, verifier); |
| if (!verifier.verify(verificationContext)) { |
| // Please do **NOT** change the prefix, it's used in test_stream_state_ttl.sh for |
| // test verifying |
| out.collect("TTL verification failed: " + verificationContext.toString()); |
| } |
| } |
| } |
| |
| private TtlVerificationContext<?, ?> generateUpdateAndVerificationContext( |
| TtlStateUpdate updates, TtlStateVerifier<?, ?> verifier) throws Exception { |
| |
| List<ValueWithTs<?>> prevUpdates = getPrevUpdates(verifier.getId()); |
| Object update = updates.getUpdate(verifier.getId()); |
| TtlUpdateContext<?, ?> updateContext = performUpdate(verifier, update); |
| stat.update(prevUpdates.size()); |
| prevUpdatesByVerifierId.get(verifier.getId()).add(updateContext.getUpdateWithTs()); |
| return new TtlVerificationContext<>( |
| updates.getKey(), verifier.getId(), prevUpdates, updateContext); |
| } |
| |
| private List<ValueWithTs<?>> getPrevUpdates(String verifierId) throws Exception { |
| return StreamSupport.stream( |
| prevUpdatesByVerifierId.get(verifierId).get().spliterator(), false) |
| .collect(Collectors.toList()); |
| } |
| |
| private TtlUpdateContext<?, ?> performUpdate(TtlStateVerifier<?, ?> verifier, Object update) |
| throws Exception { |
| |
| return MonotonicTTLTimeProvider.doWithFrozenTime( |
| frozenTimestamp -> { |
| State state = states.get(verifier.getId()); |
| Object valueBeforeUpdate = verifier.get(state); |
| verifier.update(state, update); |
| Object updatedValue = verifier.get(state); |
| return new TtlUpdateContext<>( |
| valueBeforeUpdate, update, updatedValue, frozenTimestamp); |
| }); |
| } |
| |
| @Override |
| public void snapshotState(FunctionSnapshotContext context) {} |
| |
| @Override |
| public void initializeState(FunctionInitializationContext context) { |
| states = |
| TtlStateVerifier.VERIFIERS.stream() |
| .collect( |
| Collectors.toMap( |
| TtlStateVerifier::getId, |
| v -> v.createState(context, ttlConfig))); |
| prevUpdatesByVerifierId = |
| TtlStateVerifier.VERIFIERS.stream() |
| .collect( |
| Collectors.toMap( |
| TtlStateVerifier::getId, |
| v -> { |
| checkNotNull(v); |
| final TypeSerializer<ValueWithTs<?>> typeSerializer = |
| new ValueWithTs.Serializer( |
| v.getUpdateSerializer(), |
| LongSerializer.INSTANCE); |
| |
| ListStateDescriptor<ValueWithTs<?>> stateDesc = |
| new ListStateDescriptor<>( |
| "TtlPrevValueState_" + v.getId(), |
| typeSerializer); |
| KeyedStateStore store = context.getKeyedStateStore(); |
| return store.getListState(stateDesc); |
| })); |
| } |
| |
| private static class UpdateStat implements Serializable { |
| private static final long serialVersionUID = -4557720969995878873L; |
| |
| final long reportStatAfterUpdatesNum; |
| long updates = 0; |
| long prevUpdatesNum = 0; |
| |
| UpdateStat(long reportStatAfterUpdatesNum) { |
| this.reportStatAfterUpdatesNum = reportStatAfterUpdatesNum; |
| } |
| |
| void update(long prevUpdatesSize) { |
| updates++; |
| prevUpdatesNum += prevUpdatesSize; |
| if (updates % reportStatAfterUpdatesNum == 0) { |
| LOG.info(String.format("Avg update chain length: %d", prevUpdatesNum / updates)); |
| } |
| } |
| } |
| } |