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WriteBatch.java
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WriteBatch.java
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/*
* Copyright 2019 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.example.bigtable;
// [START bigtable_writes_batch]
import com.google.api.core.ApiFuture;
import com.google.api.gax.batching.Batcher;
import com.google.api.gax.batching.BatchingException;
import com.google.cloud.bigtable.data.v2.BigtableDataClient;
import com.google.cloud.bigtable.data.v2.models.RowMutationEntry;
import com.google.cloud.bigtable.data.v2.models.TableId;
import com.google.protobuf.ByteString;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutionException;
public class WriteBatch {
private static final String COLUMN_FAMILY_NAME = "stats_summary";
public static void writeBatch(String projectId, String instanceId, String tableId) {
// String projectId = "my-project-id";
// String instanceId = "my-instance-id";
// String tableId = "mobile-time-series";
try (BigtableDataClient dataClient = BigtableDataClient.create(projectId, instanceId)) {
List<ApiFuture<Void>> batchFutures = new ArrayList<>();
try (Batcher<RowMutationEntry, Void> batcher =
dataClient.newBulkMutationBatcher(TableId.of(tableId))) {
long timestamp = System.currentTimeMillis() * 1000;
batchFutures.add(
batcher.add(
RowMutationEntry.create("tablet#a0b81f74#20190501")
.setCell(
COLUMN_FAMILY_NAME, ByteString.copyFromUtf8("connected_wifi"), timestamp, 1)
.setCell(COLUMN_FAMILY_NAME, "os_build", timestamp, "12155.0.0-rc1")));
batchFutures.add(
batcher.add(
RowMutationEntry.create("tablet#a0b81f74#20190502")
.setCell(
COLUMN_FAMILY_NAME, ByteString.copyFromUtf8("connected_wifi"), timestamp, 1)
.setCell(COLUMN_FAMILY_NAME, "os_build", timestamp, "12155.0.0-rc6")));
// Blocks until mutations are applied on all submitted row entries.
// flush will be called automatically when a batch is full.
batcher.flush();
// Before batcher is closed, all remaining (if any) mutations are applied.
} catch (BatchingException batchingException) {
System.out.println(
"At least one entry failed to apply. Summary of the errors: \n" + batchingException);
// get individual entry error details
for (ApiFuture<Void> future : batchFutures) {
try {
future.get();
} catch (ExecutionException entryException) {
System.out.println("Entry failure: " + entryException.getCause());
} catch (InterruptedException e) {
// handle interrupted exception
}
}
}
System.out.println("Successfully wrote 2 rows");
} catch (Exception e) {
System.out.println("Error during WriteBatch: \n" + e);
}
}
}
// [END bigtable_writes_batch]