/
BulkCommitBatch.java
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/
BulkCommitBatch.java
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/*
* Copyright 2020 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
*
* 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.cloud.firestore;
import com.google.api.core.ApiAsyncFunction;
import com.google.api.core.ApiFunction;
import com.google.api.core.ApiFuture;
import com.google.api.core.ApiFutures;
import com.google.api.gax.rpc.ApiException;
import com.google.cloud.Timestamp;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableMap;
import com.google.common.util.concurrent.MoreExecutors;
import com.google.firestore.v1.BatchWriteRequest;
import com.google.firestore.v1.BatchWriteResponse;
import io.grpc.Status;
import io.opencensus.trace.AttributeValue;
import io.opencensus.trace.Tracing;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.CopyOnWriteArraySet;
import java.util.concurrent.Executor;
/** Used to represent a batch that contains scheduled BulkWriterOperations. */
class BulkCommitBatch extends UpdateBuilder<ApiFuture<WriteResult>> {
final List<BulkWriterOperation> pendingOperations = new ArrayList<>();
private final Set<DocumentReference> documents = new CopyOnWriteArraySet<>();
private final Executor executor;
BulkCommitBatch(FirestoreImpl firestore, Executor executor) {
super(firestore);
this.executor = executor;
}
ApiFuture<WriteResult> wrapResult(int writeIndex) {
return pendingOperations.get(writeIndex).getFuture();
}
/**
* Commits all pending operations to the database and verifies all preconditions.
*
* <p>The writes in the batch are not applied atomically and can be applied out of order.
*/
ApiFuture<Void> bulkCommit() {
Tracing.getTracer()
.getCurrentSpan()
.addAnnotation(
TraceUtil.SPAN_NAME_BATCHWRITE,
ImmutableMap.of("numDocuments", AttributeValue.longAttributeValue(getWrites().size())));
final BatchWriteRequest.Builder request = BatchWriteRequest.newBuilder();
request.setDatabase(firestore.getDatabaseName());
for (WriteOperation writeOperation : getWrites()) {
request.addWrites(writeOperation.write);
}
committed = true;
ApiFuture<BatchWriteResponse> response =
processExceptions(
firestore.sendRequest(request.build(), firestore.getClient().batchWriteCallable()));
return ApiFutures.transformAsync(
response,
new ApiAsyncFunction<BatchWriteResponse, Void>() {
@Override
public ApiFuture<Void> apply(BatchWriteResponse batchWriteResponse) {
List<ApiFuture<Void>> pendingUserCallbacks = new ArrayList<>();
List<com.google.firestore.v1.WriteResult> writeResults =
batchWriteResponse.getWriteResultsList();
List<com.google.rpc.Status> statuses = batchWriteResponse.getStatusList();
for (int i = 0; i < writeResults.size(); ++i) {
com.google.firestore.v1.WriteResult writeResult = writeResults.get(i);
com.google.rpc.Status status = statuses.get(i);
BulkWriterOperation operation = pendingOperations.get(i);
Status code = Status.fromCodeValue(status.getCode());
if (code == Status.OK) {
pendingUserCallbacks.add(
operation.onSuccess(
new WriteResult(Timestamp.fromProto(writeResult.getUpdateTime()))));
} else {
pendingUserCallbacks.add(
operation.onException(
FirestoreException.forServerRejection(code, status.getMessage())));
}
}
return BulkWriter.silenceFuture(ApiFutures.allAsList(pendingUserCallbacks));
}
},
executor);
}
/** Maps an RPC failure to each individual write's result. */
private ApiFuture<BatchWriteResponse> processExceptions(ApiFuture<BatchWriteResponse> response) {
return ApiFutures.catching(
response,
ApiException.class,
new ApiFunction<ApiException, BatchWriteResponse>() {
@Override
public BatchWriteResponse apply(ApiException exception) {
com.google.rpc.Status.Builder status =
com.google.rpc.Status.newBuilder()
.setCode(exception.getStatusCode().getCode().ordinal())
.setMessage(exception.getMessage());
BatchWriteResponse.Builder response = BatchWriteResponse.newBuilder();
for (int i = 0; i < pendingOperations.size(); ++i) {
response.addWriteResults(com.google.firestore.v1.WriteResult.getDefaultInstance());
response.addStatus(status);
}
return response.build();
}
},
MoreExecutors.directExecutor());
}
void enqueueOperation(BulkWriterOperation operation) {
boolean added = documents.add(operation.getDocumentReference());
Preconditions.checkState(added, "Batch should not contain writes to the same document");
pendingOperations.add(operation);
}
boolean has(DocumentReference documentReference) {
return documents.contains(documentReference);
}
}