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GrpcFirestoreRpc.java
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GrpcFirestoreRpc.java
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/*
* Copyright 2017 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.spi.v1;
import com.google.api.core.ApiFunction;
import com.google.api.gax.core.BackgroundResource;
import com.google.api.gax.core.GaxProperties;
import com.google.api.gax.grpc.GrpcCallContext;
import com.google.api.gax.grpc.GrpcTransportChannel;
import com.google.api.gax.rpc.BidiStreamingCallable;
import com.google.api.gax.rpc.ClientContext;
import com.google.api.gax.rpc.HeaderProvider;
import com.google.api.gax.rpc.NoHeaderProvider;
import com.google.api.gax.rpc.ServerStreamingCallable;
import com.google.api.gax.rpc.TransportChannel;
import com.google.api.gax.rpc.UnaryCallSettings;
import com.google.api.gax.rpc.UnaryCallSettings.Builder;
import com.google.api.gax.rpc.UnaryCallable;
import com.google.cloud.NoCredentials;
import com.google.cloud.ServiceOptions;
import com.google.cloud.firestore.FirestoreOptions;
import com.google.cloud.firestore.v1.FirestoreClient;
import com.google.cloud.firestore.v1.FirestoreClient.ListCollectionIdsPagedResponse;
import com.google.cloud.firestore.v1.FirestoreClient.ListDocumentsPagedResponse;
import com.google.cloud.firestore.v1.FirestoreSettings;
import com.google.cloud.firestore.v1.stub.FirestoreStub;
import com.google.cloud.firestore.v1.stub.FirestoreStubSettings;
import com.google.cloud.firestore.v1.stub.GrpcFirestoreStub;
import com.google.cloud.grpc.GrpcTransportOptions;
import com.google.cloud.grpc.GrpcTransportOptions.ExecutorFactory;
import com.google.firestore.v1.BatchGetDocumentsRequest;
import com.google.firestore.v1.BatchGetDocumentsResponse;
import com.google.firestore.v1.BeginTransactionRequest;
import com.google.firestore.v1.BeginTransactionResponse;
import com.google.firestore.v1.CommitRequest;
import com.google.firestore.v1.CommitResponse;
import com.google.firestore.v1.DatabaseRootName;
import com.google.firestore.v1.ListCollectionIdsRequest;
import com.google.firestore.v1.ListDocumentsRequest;
import com.google.firestore.v1.ListenRequest;
import com.google.firestore.v1.ListenResponse;
import com.google.firestore.v1.PartitionQueryRequest;
import com.google.firestore.v1.RollbackRequest;
import com.google.firestore.v1.RunQueryRequest;
import com.google.firestore.v1.RunQueryResponse;
import com.google.protobuf.Empty;
import io.grpc.CallOptions;
import io.grpc.ManagedChannel;
import io.grpc.ManagedChannelBuilder;
import java.io.IOException;
import java.util.Collections;
import java.util.concurrent.ScheduledExecutorService;
/**
* GRPC client implementation of the Firestore RPC methods. Exposes FirestoreOptions on top of the
* GRPC-based Firestore GAPIC client.
*/
public class GrpcFirestoreRpc implements FirestoreRpc {
private final FirestoreStub firestoreStub;
private final ScheduledExecutorService executor;
private final ExecutorFactory<ScheduledExecutorService> executorFactory;
private final ClientContext clientContext;
private boolean closed;
public GrpcFirestoreRpc(final FirestoreOptions options) throws IOException {
GrpcTransportOptions transportOptions = (GrpcTransportOptions) options.getTransportOptions();
executorFactory = transportOptions.getExecutorFactory();
executor = executorFactory.get();
try {
if (options.getHost().contains("localhost")
|| NoCredentials.getInstance().equals(options.getCredentials())) {
ManagedChannel managedChannel =
ManagedChannelBuilder.forTarget(options.getHost())
.usePlaintext()
.executor(executor)
.build();
TransportChannel transportChannel = GrpcTransportChannel.create(managedChannel);
clientContext =
ClientContext.newBuilder()
.setCredentials(null)
.setExecutor(executor)
.setTransportChannel(transportChannel)
.setDefaultCallContext(GrpcCallContext.of(managedChannel, CallOptions.DEFAULT))
.setBackgroundResources(
Collections.<BackgroundResource>singletonList(transportChannel))
.build();
} else {
FirestoreSettingsBuilder settingsBuilder =
new FirestoreSettingsBuilder(FirestoreSettings.newBuilder().build());
DatabaseRootName databaseName =
DatabaseRootName.of(options.getProjectId(), options.getDatabaseId());
settingsBuilder.setCredentialsProvider(options.getCredentialsProvider());
settingsBuilder.setTransportChannelProvider(options.getTransportChannelProvider());
HeaderProvider internalHeaderProvider =
FirestoreSettings.defaultApiClientHeaderProviderBuilder()
.setClientLibToken(
ServiceOptions.getGoogApiClientLibName(),
GaxProperties.getLibraryVersion(options.getClass()))
.setResourceToken(databaseName.toString())
.build();
settingsBuilder.setInternalHeaderProvider(internalHeaderProvider);
settingsBuilder.setHeaderProvider(options.getMergedHeaderProvider(new NoHeaderProvider()));
clientContext = ClientContext.create(settingsBuilder.build());
}
ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> retrySettingsSetter =
new ApiFunction<Builder<?, ?>, Void>() {
@Override
public Void apply(UnaryCallSettings.Builder<?, ?> builder) {
builder.setRetrySettings(options.getRetrySettings());
return null;
}
};
FirestoreStubSettings.Builder firestoreBuilder =
FirestoreStubSettings.newBuilder(clientContext)
.applyToAllUnaryMethods(retrySettingsSetter);
firestoreStub = GrpcFirestoreStub.create(firestoreBuilder.build());
} catch (Exception e) {
throw new IOException(e);
}
}
@Override
public void close() throws Exception {
if (closed) {
return;
}
closed = true;
firestoreStub.close();
for (BackgroundResource resource : clientContext.getBackgroundResources()) {
resource.close();
}
executorFactory.release(executor);
}
@Override
public ScheduledExecutorService getExecutor() {
return executor;
}
@Override
public UnaryCallable<CommitRequest, CommitResponse> commitCallable() {
return firestoreStub.commitCallable();
}
@Override
public ServerStreamingCallable<BatchGetDocumentsRequest, BatchGetDocumentsResponse>
batchGetDocumentsCallable() {
return firestoreStub.batchGetDocumentsCallable();
}
@Override
public ServerStreamingCallable<RunQueryRequest, RunQueryResponse> runQueryCallable() {
return firestoreStub.runQueryCallable();
}
@Override
public UnaryCallable<BeginTransactionRequest, BeginTransactionResponse>
beginTransactionCallable() {
return firestoreStub.beginTransactionCallable();
}
@Override
public UnaryCallable<RollbackRequest, Empty> rollbackCallable() {
return firestoreStub.rollbackCallable();
}
@Override
public UnaryCallable<ListCollectionIdsRequest, ListCollectionIdsPagedResponse>
listCollectionIdsPagedCallable() {
return firestoreStub.listCollectionIdsPagedCallable();
}
@Override
public UnaryCallable<PartitionQueryRequest, FirestoreClient.PartitionQueryPagedResponse>
partitionQueryPagedCallable() {
return firestoreStub.partitionQueryPagedCallable();
}
@Override
public UnaryCallable<ListDocumentsRequest, ListDocumentsPagedResponse>
listDocumentsPagedCallable() {
return firestoreStub.listDocumentsPagedCallable();
}
@Override
public BidiStreamingCallable<ListenRequest, ListenResponse> listenCallable() {
return firestoreStub.listenCallable();
}
// This class is needed solely to get access to protected method setInternalHeaderProvider()
private static class FirestoreSettingsBuilder extends FirestoreSettings.Builder {
private FirestoreSettingsBuilder(FirestoreSettings settings) {
super(settings);
}
@Override
protected FirestoreSettings.Builder setInternalHeaderProvider(
HeaderProvider internalHeaderProvider) {
return super.setInternalHeaderProvider(internalHeaderProvider);
}
}
}