Line data    Source code

       1             : // Copyright (C) 2019 The Android Open Source Project
       2             : //
       3             : // Licensed under the Apache License, Version 2.0 (the "License");
       4             : // you may not use this file except in compliance with the License.
       5             : // You may obtain a copy of the License at
       6             : //
       7             : // http://www.apache.org/licenses/LICENSE-2.0
       8             : //
       9             : // Unless required by applicable law or agreed to in writing, software
      10             : // distributed under the License is distributed on an "AS IS" BASIS,
      11             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             : // See the License for the specific language governing permissions and
      13             : // limitations under the License.
      14             : 
      15             : package com.google.gerrit.server.update;
      16             : 
      17             : import com.github.rholder.retry.RetryListener;
      18             : import com.google.common.base.Throwables;
      19             : import com.google.gerrit.exceptions.StorageException;
      20             : import com.google.gerrit.index.query.InternalQuery;
      21             : import com.google.inject.Provider;
      22             : import java.util.function.Consumer;
      23             : import java.util.function.Predicate;
      24             : 
      25             : /**
      26             :  * An action to query an index that is executed with retrying.
      27             :  *
      28             :  * <p>Instances of this class are created via {@link RetryHelper#accountIndexQuery(String,
      29             :  * IndexQueryAction)} and {@link RetryHelper#changeIndexQuery(String, IndexQueryAction)}.
      30             :  *
      31             :  * <p>In contrast to normal {@link RetryableAction.Action}s that are called via {@link
      32             :  * RetryableAction} {@link IndexQueryAction}s get a {@link InternalQuery} provided.
      33             :  *
      34             :  * <p>In addition when an index query action is called any exception that is not an unchecked
      35             :  * exception gets wrapped into an {@link StorageException}.
      36             :  */
      37             : public class RetryableIndexQueryAction<Q extends InternalQuery<?, Q>, T>
      38             :     extends RetryableAction<T> {
      39             :   @FunctionalInterface
      40             :   public interface IndexQueryAction<T, Q> {
      41             :     T call(Q internalQuery) throws Exception;
      42             :   }
      43             : 
      44             :   RetryableIndexQueryAction(
      45             :       RetryHelper retryHelper,
      46             :       Provider<Q> internalQuery,
      47             :       String actionName,
      48             :       IndexQueryAction<T, Q> indexQuery) {
      49          61 :     super(
      50             :         retryHelper,
      51             :         ActionType.INDEX_QUERY,
      52             :         actionName,
      53          61 :         () -> indexQuery.call(internalQuery.get()));
      54          61 :   }
      55             : 
      56             :   @Override
      57             :   public RetryableIndexQueryAction<Q, T> retryOn(Predicate<Throwable> exceptionPredicate) {
      58           0 :     super.retryOn(exceptionPredicate);
      59           0 :     return this;
      60             :   }
      61             : 
      62             :   @Override
      63             :   public RetryableIndexQueryAction<Q, T> retryWithTrace(Predicate<Throwable> exceptionPredicate) {
      64           0 :     super.retryWithTrace(exceptionPredicate);
      65           0 :     return this;
      66             :   }
      67             : 
      68             :   @Override
      69             :   public RetryableIndexQueryAction<Q, T> onAutoTrace(Consumer<String> traceIdConsumer) {
      70           0 :     super.onAutoTrace(traceIdConsumer);
      71           0 :     return this;
      72             :   }
      73             : 
      74             :   @Override
      75             :   public RetryableIndexQueryAction<Q, T> listener(RetryListener retryListener) {
      76           0 :     super.listener(retryListener);
      77           0 :     return this;
      78             :   }
      79             : 
      80             :   @Override
      81             :   public RetryableIndexQueryAction<Q, T> defaultTimeoutMultiplier(int multiplier) {
      82           0 :     super.defaultTimeoutMultiplier(multiplier);
      83           0 :     return this;
      84             :   }
      85             : 
      86             :   @Override
      87             :   public T call() {
      88             :     try {
      89          61 :       return super.call();
      90           0 :     } catch (Exception e) {
      91           0 :       Throwables.throwIfUnchecked(e);
      92           0 :       throw new StorageException(e);
      93             :     }
      94             :   }
      95             : }