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Callables.java
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Callables.java
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/*
* Copyright 2023 Google LLC
*
* 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
*
* https://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.cloud.bigtable.gaxx.retrying;
import com.google.api.core.InternalApi;
import com.google.api.gax.retrying.ExponentialRetryAlgorithm;
import com.google.api.gax.retrying.RetryAlgorithm;
import com.google.api.gax.retrying.ScheduledRetryingExecutor;
import com.google.api.gax.retrying.StreamingRetryAlgorithm;
import com.google.api.gax.rpc.ClientContext;
import com.google.api.gax.rpc.ServerStreamingCallSettings;
import com.google.api.gax.rpc.ServerStreamingCallable;
import com.google.api.gax.rpc.UnaryCallSettings;
import com.google.api.gax.rpc.UnaryCallable;
// TODO: remove this once ApiResultRetryAlgorithm is added to gax.
/**
* Class with utility methods to create callable objects using provided settings.
*
* <p>The callable objects wrap a given direct callable with features like retry and exception
* translation.
*/
@InternalApi
public class Callables {
private Callables() {}
public static <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> retrying(
UnaryCallable<RequestT, ResponseT> innerCallable,
UnaryCallSettings<?, ?> callSettings,
ClientContext clientContext) {
UnaryCallSettings<?, ?> settings = callSettings;
RetryAlgorithm<ResponseT> retryAlgorithm =
new RetryAlgorithm<>(
new RetryInfoRetryAlgorithm<>(),
new ExponentialRetryAlgorithm(settings.getRetrySettings(), clientContext.getClock()));
ScheduledRetryingExecutor<ResponseT> executor =
new ScheduledRetryingExecutor<>(retryAlgorithm, clientContext.getExecutor());
return new RetryingCallable<>(clientContext.getDefaultCallContext(), innerCallable, executor);
}
public static <RequestT, ResponseT> ServerStreamingCallable<RequestT, ResponseT> retrying(
ServerStreamingCallable<RequestT, ResponseT> innerCallable,
ServerStreamingCallSettings<RequestT, ResponseT> callSettings,
ClientContext clientContext) {
ServerStreamingCallSettings<RequestT, ResponseT> settings = callSettings;
StreamingRetryAlgorithm<Void> retryAlgorithm =
new StreamingRetryAlgorithm<>(
new RetryInfoRetryAlgorithm<>(),
new ExponentialRetryAlgorithm(settings.getRetrySettings(), clientContext.getClock()));
ScheduledRetryingExecutor<Void> retryingExecutor =
new ScheduledRetryingExecutor<>(retryAlgorithm, clientContext.getExecutor());
return new RetryingServerStreamingCallable<>(
innerCallable, retryingExecutor, settings.getResumptionStrategy());
}
}