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// Copyright (C) 2019 The Android Open Source Project
//
// Licensed 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 com.google.gerrit.server.update;

import com.github.rholder.retry.RetryListener;
import com.google.common.base.Throwables;
import com.google.gerrit.exceptions.StorageException;
import com.google.gerrit.index.query.InternalQuery;
import com.google.inject.Provider;
import java.util.function.Consumer;
import java.util.function.Predicate;

/**
 * An action to query an index that is executed with retrying.
 *
 * 

Instances of this class are created via {@link RetryHelper#accountIndexQuery(String, * IndexQueryAction)} and {@link RetryHelper#changeIndexQuery(String, IndexQueryAction)}. * *

In contrast to normal {@link RetryableAction.Action}s that are called via {@link * RetryableAction} {@link IndexQueryAction}s get a {@link InternalQuery} provided. * *

In addition when an index query action is called any exception that is not an unchecked * exception gets wrapped into an {@link StorageException}. */ public class RetryableIndexQueryAction, T> extends RetryableAction { @FunctionalInterface public interface IndexQueryAction { T call(Q internalQuery) throws Exception; } RetryableIndexQueryAction( RetryHelper retryHelper, Provider internalQuery, String actionName, IndexQueryAction indexQuery) { super( retryHelper, ActionType.INDEX_QUERY, actionName, () -> indexQuery.call(internalQuery.get())); } @Override public RetryableIndexQueryAction retryOn(Predicate exceptionPredicate) { super.retryOn(exceptionPredicate); return this; } @Override public RetryableIndexQueryAction retryWithTrace(Predicate exceptionPredicate) { super.retryWithTrace(exceptionPredicate); return this; } @Override public RetryableIndexQueryAction onAutoTrace(Consumer traceIdConsumer) { super.onAutoTrace(traceIdConsumer); return this; } @Override public RetryableIndexQueryAction listener(RetryListener retryListener) { super.listener(retryListener); return this; } @Override public RetryableIndexQueryAction defaultTimeoutMultiplier(int multiplier) { super.defaultTimeoutMultiplier(multiplier); return this; } @Override public T call() { try { return super.call(); } catch (Exception e) { Throwables.throwIfUnchecked(e); throw new StorageException(e); } } }





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