com.google.cloud.bigtable.data.v2

Class BigtableDataClient

java.lang.Object

com.google.cloud.bigtable.data.v2.BigtableDataClient

All Implemented Interfaces:

AutoCloseable

public class BigtableDataClient
extends Object
implements AutoCloseable

Client for reading from and writing to existing Bigtable tables.

This class provides the ability to make remote calls to the backing service. Sample code to get started:

 // One instance per application.
 BigtableDataClient client = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")

 for(Row row : client.readRows(Query.create("[TABLE]")) {
   // Do something with row
 }

 // Cleanup during application shutdown.
 client.close();
 

Creating a new client is a very expensive operation and should only be done once and shared in an application. However, close() needs to be called on the client object to clean up resources such as threads during application shutdown.

The surface of this class includes several types of Java methods for each of the API's methods:

1. A "flattened" method, like `readRows()`. With this type of method, the fields of the request type have been converted into function parameters. It may be the case that not all fields are available as parameters, and not every API method will have a flattened method entry point.
2. A "callable" method, like `readRowsCallable()`. This type of method takes no parameters and returns an immutable API callable object, which can be used to initiate calls to the service.

Taking ReadRows as an example for callable:

 // These two invocation are equivalent
 ServerStream<Row> stream1 = client.readRows(query);
 ServerStream<Row> stream2 = client.readRowsCallable().call(query);

 // These two invocation are also equivalent
 client.readRowsAsync(query, observer);
 client.readRowsCallable().call(query, observer);
 

All RPC related errors are represented as subclasses of ApiException. For example, a nonexistent table will trigger a NotFoundException. Async methods will wrap the error inside the future. Synchronous methods will re-throw the async error but will try to preserve the caller's stacktrace by attaching a suppressed exception at the callsite. This allows callers to use typesafe exceptions, without losing their callsite. Streaming methods (ie. readRows) will re-throw the async exception (like sync methods) when starting iteration.

See the individual methods for example code.

This class can be customized by passing in a custom instance of BigtableDataSettings to create(). For example:

To customize credentials:

 BigtableDataSettings settings =
     BigtableDataSettings.newBuilder()
         .setProjectId("[PROJECT]")
         .setInstanceId("[INSTANCE]")
         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
         .build();
 BigtableDataClient client = BigtableDataClient.create(settings);
 

To customize the endpoint:

 BigtableDataSettings.Builder settingsBuilder =
     BigtableDataSettings.newBuilder()
       .setProjectId("[PROJECT]")
       .setInstanceId("[INSTANCE]");

 settingsBuilder.stubSettings()
     .setEndpoint(myEndpoint).build();

 BigtableDataClient client = BigtableDataClient.create(settings.build());
 

Method Summary

Modifier and Type	Method and Description
void	bulkMutateRows(BulkMutation mutation) Convenience method to mutate multiple rows in a batch.
com.google.api.core.ApiFuture<Void>	bulkMutateRowsAsync(BulkMutation mutation) Convenience method to mutate multiple rows in a batch.
com.google.api.gax.rpc.UnaryCallable<BulkMutation,Void>	bulkMutationCallable() Mutates multiple rows in a batch.
Boolean	checkAndMutateRow(ConditionalRowMutation mutation) Convenience method to synchronously mutate a row atomically based on the output of a filter.
com.google.api.core.ApiFuture<Boolean>	checkAndMutateRowAsync(ConditionalRowMutation mutation) Convenience method to asynchronously mutate a row atomically based on the output of a filter.
com.google.api.gax.rpc.UnaryCallable<ConditionalRowMutation,Boolean>	checkAndMutateRowCallable() Mutates a row atomically based on the output of a filter.
void	close() Close the clients and releases all associated resources.
static BigtableDataClient	create(BigtableDataSettings settings) Constructs an instance of BigtableDataClient, using the given settings.
static BigtableDataClient	create(String projectId, String instanceId) Constructs an instance of BigtableDataClient with default settings.
void	mutateRow(RowMutation rowMutation) Convenience method to synchronously mutate a single row atomically.
com.google.api.core.ApiFuture<Void>	mutateRowAsync(RowMutation rowMutation) Convenience method to asynchronously mutate a single row atomically.
com.google.api.gax.rpc.UnaryCallable<RowMutation,Void>	mutateRowCallable() Mutates a single row atomically.
com.google.api.gax.batching.Batcher<RowMutationEntry,Void>	newBulkMutationBatcher(String tableId) Mutates multiple rows in a batch.
Row	readModifyWriteRow(ReadModifyWriteRow mutation) Convenience method that synchronously modifies a row atomically on the server.
com.google.api.core.ApiFuture<Row>	readModifyWriteRowAsync(ReadModifyWriteRow mutation) Convenience method that asynchronously modifies a row atomically on the server.
com.google.api.gax.rpc.UnaryCallable<ReadModifyWriteRow,Row>	readModifyWriteRowCallable() Modifies a row atomically on the server.
Row	readRow(String tableId, ByteString rowKey) Convenience method for synchronously reading a single row.
Row	readRow(String tableId, ByteString rowKey, Filters.Filter filter) Convenience method for synchronously reading a single row.
Row	readRow(String tableId, String rowKey) Convenience method for synchronously reading a single row.
Row	readRow(String tableId, String rowKey, Filters.Filter filter) Convenience method for synchronously reading a single row.
com.google.api.core.ApiFuture<Row>	readRowAsync(String tableId, ByteString rowKey) Convenience method for asynchronously reading a single row.
com.google.api.core.ApiFuture<Row>	readRowAsync(String tableId, ByteString rowKey, Filters.Filter filter) Convenience method for asynchronously reading a single row.
com.google.api.core.ApiFuture<Row>	readRowAsync(String tableId, String rowKey) Convenience method for asynchronously reading a single row.
com.google.api.core.ApiFuture<Row>	readRowAsync(String tableId, String rowKey, Filters.Filter filter) Convenience method for asynchronously reading a single row.
com.google.api.gax.rpc.UnaryCallable<Query,Row>	readRowCallable() Reads a single row.
<RowT> com.google.api.gax.rpc.UnaryCallable<Query,RowT>	readRowCallable(RowAdapter<RowT> rowAdapter) Reads a single row.
com.google.api.gax.rpc.ServerStream<Row>	readRows(Query query) Convenience method for synchronously streaming the results of a Query.
void	readRowsAsync(Query query, com.google.api.gax.rpc.ResponseObserver<Row> observer) Convenience method for asynchronously streaming the results of a Query.
com.google.api.gax.rpc.ServerStreamingCallable<Query,Row>	readRowsCallable() Streams back the results of the query.
<RowT> com.google.api.gax.rpc.ServerStreamingCallable<Query,RowT>	readRowsCallable(RowAdapter<RowT> rowAdapter) Streams back the results of the query.
List<KeyOffset>	sampleRowKeys(String tableId) Convenience method to synchronously return a sample of row keys in the table.
com.google.api.core.ApiFuture<List<KeyOffset>>	sampleRowKeysAsync(String tableId) Convenience method to asynchronously return a sample of row keys in the table.
com.google.api.gax.rpc.UnaryCallable<String,List<KeyOffset>>	sampleRowKeysCallable() Returns a sample of row keys in the table.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

create

public static BigtableDataClient create(String projectId,
                                        String instanceId)
                                 throws IOException

Constructs an instance of BigtableDataClient with default settings.

Parameters:

projectId - The project id of the instance to connect to.

instanceId - The id of the instance to connect to.

Returns:

A new client.

Throws:

IOException - If any.

create

public static BigtableDataClient create(BigtableDataSettings settings)
                                 throws IOException

Constructs an instance of BigtableDataClient, using the given settings. The channels are created based on the settings passed in, or defaults for any settings that are not set.

Throws:

IOException

readRow

public Row readRow(String tableId,
                   ByteString rowKey)

Convenience method for synchronously reading a single row. If the row does not exist, the value will be null.

Sample code:

{code
 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
 String tableId = "[TABLE]";

 Row row = bigtableDataClient.readRow(tableId, ByteString.copyFromUtf8("key"));
 // Do something with row, for example, display all cells
 if(row != null) {
   System.out.println(row.getKey().toStringUtf8());
   for(RowCell cell : row.getCells()) {
      System.out.printf("Family: %s   Qualifier: %s   Value: %s", cell.getFamily(),
         cell.getQualifier().toStringUtf8(), cell.getValue().toStringUtf8());
   }
 }
 } catch(ApiException e) {
   e.printStackTrace();
 }
 }

Throws:

com.google.api.gax.rpc.ApiException - when a serverside error occurs

readRow

public Row readRow(String tableId,
                   String rowKey)

Convenience method for synchronously reading a single row. If the row does not exist, the value will be null.

Sample code:

{code
 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   String tableId = "[TABLE]";

   Row row = bigtableDataClient.readRow(tableId, "key");
   // Do something with row, for example, display all cells
   if(row != null) {
     System.out.println(row.getKey().toStringUtf8());
      for(RowCell cell : row.getCells()) {
        System.out.printf("Family: %s   Qualifier: %s   Value: %s", cell.getFamily(),
           cell.getQualifier().toStringUtf8(), cell.getValue().toStringUtf8());
      }
   }
 } catch(ApiException e) {
   e.printStackTrace();
 }
 }

Throws:

com.google.api.gax.rpc.ApiException - when a serverside error occurs

readRow

public Row readRow(String tableId,
                   String rowKey,
                   @Nullable
                   Filters.Filter filter)

Convenience method for synchronously reading a single row. If the row does not exist, the value will be null.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   String tableId = "[TABLE]";

  // Build the filter expression
  Filter filter = FILTERS.chain()
         .filter(FILTERS.qualifier().regex("prefix.*"))
         .filter(FILTERS.limit().cellsPerRow(10));

   Row row = bigtableDataClient.readRow(tableId, "key", filter);
   // Do something with row, for example, display all cells
   if(row != null) {
     System.out.println(row.getKey().toStringUtf8());
      for(RowCell cell : row.getCells()) {
        System.out.printf("Family: %s   Qualifier: %s   Value: %s", cell.getFamily(),
           cell.getQualifier().toStringUtf8(), cell.getValue().toStringUtf8());
      }
   }
 } catch(ApiException e) {
   e.printStackTrace();
 }
 

Throws:

com.google.api.gax.rpc.ApiException - when a serverside error occurs

readRow

public Row readRow(String tableId,
                   ByteString rowKey,
                   @Nullable
                   Filters.Filter filter)

Convenience method for synchronously reading a single row. If the row does not exist, the value will be null.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   String tableId = "[TABLE]";

  // Build the filter expression
  Filter filter = FILTERS.chain()
         .filter(FILTERS.qualifier().regex("prefix.*"))
         .filter(FILTERS.limit().cellsPerRow(10));

   Row row = bigtableDataClient.readRow(tableId, ByteString.copyFromUtf8("key"), filter);
   // Do something with row, for example, display all cells
   if(row != null) {
     System.out.println(row.getKey().toStringUtf8());
      for(RowCell cell : row.getCells()) {
        System.out.printf("Family: %s   Qualifier: %s   Value: %s", cell.getFamily(),
           cell.getQualifier().toStringUtf8(), cell.getValue().toStringUtf8());
      }
   }
 } catch(ApiException e) {
   e.printStackTrace();
 }
 

Throws:

com.google.api.gax.rpc.ApiException - when a serverside error occurs

readRowAsync

public com.google.api.core.ApiFuture<Row> readRowAsync(String tableId,
                                                       String rowKey)

Convenience method for asynchronously reading a single row. If the row does not exist, the future's value will be null.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   String tableId = "[TABLE]";

   ApiFuture<Row> futureResult = bigtableDataClient.readRowAsync(tableId,  "key");

   ApiFutures.addCallback(futureResult, new ApiFutureCallback<Row>() {
     public void onFailure(Throwable t) {
       if (t instanceof NotFoundException) {
         System.out.println("Tried to read a non-existent table");
       } else {
         t.printStackTrace();
       }
     }
     public void onSuccess(Row result) {
       if (result != null) {
          System.out.println("Got row: " + result);
       }
     }
   }, MoreExecutors.directExecutor());
 }
 

readRowAsync

public com.google.api.core.ApiFuture<Row> readRowAsync(String tableId,
                                                       ByteString rowKey)

Convenience method for asynchronously reading a single row. If the row does not exist, the future's value will be null.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   String tableId = "[TABLE]";

   ApiFuture<Row> futureResult = bigtableDataClient.readRowAsync(tableId,  ByteString.copyFromUtf8("key"));

   ApiFutures.addCallback(futureResult, new ApiFutureCallback<Row>() {
     public void onFailure(Throwable t) {
       if (t instanceof NotFoundException) {
         System.out.println("Tried to read a non-existent table");
       } else {
         t.printStackTrace();
       }
     }
     public void onSuccess(Row row) {
       if (result != null) {
          System.out.println("Got row: " + result);
       }
     }
   }, MoreExecutors.directExecutor());
 }
 

readRowAsync

public com.google.api.core.ApiFuture<Row> readRowAsync(String tableId,
                                                       String rowKey,
                                                       @Nullable
                                                       Filters.Filter filter)

Convenience method for asynchronously reading a single row. If the row does not exist, the future's value will be null.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   String tableId = "[TABLE]";

  // Build the filter expression
   Filters.Filter filter = FILTERS.chain()
         .filter(FILTERS.qualifier().regex("prefix.*"))
         .filter(FILTERS.limit().cellsPerRow(10));

   ApiFuture<Row> futureResult = bigtableDataClient.readRowAsync(tableId, "key", filter);

   ApiFutures.addCallback(futureResult, new ApiFutureCallback<Row>() {
     public void onFailure(Throwable t) {
       if (t instanceof NotFoundException) {
         System.out.println("Tried to read a non-existent table");
       } else {
         t.printStackTrace();
       }
     }
     public void onSuccess(Row row) {
       if (result != null) {
          System.out.println("Got row: " + result);
       }
     }
   }, MoreExecutors.directExecutor());
 }
 

readRowAsync

public com.google.api.core.ApiFuture<Row> readRowAsync(String tableId,
                                                       ByteString rowKey,
                                                       @Nullable
                                                       Filters.Filter filter)

Convenience method for asynchronously reading a single row. If the row does not exist, the future's value will be null.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   String tableId = "[TABLE]";

  // Build the filter expression
  Filters.Filter filter = FILTERS.chain()
         .filter(FILTERS.qualifier().regex("prefix.*"))
         .filter(FILTERS.limit().cellsPerRow(10));

   ApiFuture<Row> futureResult = bigtableDataClient.readRowAsync(tableId, ByteString.copyFromUtf8("key"), filter);

   ApiFutures.addCallback(futureResult, new ApiFutureCallback<Row>() {
     public void onFailure(Throwable t) {
       if (t instanceof NotFoundException) {
         System.out.println("Tried to read a non-existent table");
       } else {
         t.printStackTrace();
       }
     }
     public void onSuccess(Row row) {
       if (result != null) {
          System.out.println("Got row: " + result);
       }
     }
   }, MoreExecutors.directExecutor());
 }
 

readRowCallable

public com.google.api.gax.rpc.UnaryCallable<Query,Row> readRowCallable()

Reads a single row. The returned callable object allows for customization of api invocation.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   String tableId = "[TABLE]";

   Query query = Query.create(tableId)
          .rowKey("[KEY]")
          .filter(FILTERS.qualifier().regex("[COLUMN PREFIX].*"));

   // Synchronous invocation
   try {
     Row row = bigtableDataClient.readRowCallable().call(query);
     if (row == null) {
       System.out.println("Row not found");
     }
   } catch (RuntimeException e) {
     e.printStackTrace();
   }

   // Asynchronous invocation
   ApiFuture<Row> rowFuture = bigtableDataClient.readRowCallable().futureCall(query);

   ApiFutures.addCallback(rowFuture, new ApiFutureCallback<Row>() {
     public void onFailure(Throwable t) {
       if (t instanceof NotFoundException) {
         System.out.println("Tried to read a non-existent table");
       } else {
         t.printStackTrace();
       }
     }
     public void onSuccess(Row row) {
       if (row == null) {
         System.out.println("Row not found");
       }
     }
   }, MoreExecutors.directExecutor());
 }
 

See Also:

For call styles., For query options., For the filter building DSL.

readRowCallable

public <RowT> com.google.api.gax.rpc.UnaryCallable<Query,RowT> readRowCallable(RowAdapter<RowT> rowAdapter)

Reads a single row. This callable allows for customization of the logical representation of a row. It's meant for advanced use cases.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   String tableId = "[TABLE]";

   Query query = Query.create(tableId)
          .rowKey("[KEY]")
          .filter(FILTERS.qualifier().regex("[COLUMN PREFIX].*"));

   // Synchronous invocation
   CustomRow row = bigtableDataClient.readRowCallable(new CustomRowAdapter()).call(query));
   // Do something with row
 }
 

See Also:

For call styles., For query options., For the filter building DSL.

readRows

public com.google.api.gax.rpc.ServerStream<Row> readRows(Query query)

Convenience method for synchronously streaming the results of a Query.

Sample code:

 // Import the filter DSL
 import static com.google.cloud.bigtable.data.v2.models.Filters.FILTERS;

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   String tableId = "[TABLE]";

   Query query = Query.create(tableId)
          .range("[START KEY]", "[END KEY]")
          .filter(FILTERS.qualifier().regex("[COLUMN PREFIX].*"));

   try {
     ServerStream<Row> stream = bigtableDataClient.readRows(query);
     int count = 0;

     // Iterator style
     for (Row row : stream) {
       if (++count > 10) {
         stream.cancel();
         break;
       }
       // Do something with row
     }
   } catch (NotFoundException e) {
     System.out.println("Tried to read a non-existent table");
   } catch (RuntimeException e) {
     e.printStackTrace();
   }
 }
 

See Also:

For call styles., For query options., For the filter building DSL.

readRowsAsync

public void readRowsAsync(Query query,
                          com.google.api.gax.rpc.ResponseObserver<Row> observer)

Convenience method for asynchronously streaming the results of a Query.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   String tableId = "[TABLE]";

   Query query = Query.create(tableId)
          .range("[START KEY]", "[END KEY]")
          .filter(FILTERS.qualifier().regex("[COLUMN PREFIX].*"));

   bigtableDataClient.readRowsAsync(query, new ResponseObserver<Row>() {
     StreamController controller;
     int count = 0;

     public void onStart(StreamController controller) {
       this.controller = controller;
     }
     public void onResponse(Row row) {
       if (++count > 10) {
         controller.cancel();
         return;
       }
       // Do something with Row
     }
     public void onError(Throwable t) {
       if (t instanceof NotFoundException) {
         System.out.println("Tried to read a non-existent table");
       } else {
         t.printStackTrace();
       }
     }
     public void onComplete() {
       // Handle stream completion
     }
   });
 }
 

readRowsCallable

public com.google.api.gax.rpc.ServerStreamingCallable<Query,Row> readRowsCallable()

Streams back the results of the query. The returned callable object allows for customization of api invocation.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   String tableId = "[TABLE]";

   Query query = Query.create(tableId)
          .range("[START KEY]", "[END KEY]")
          .filter(FILTERS.qualifier().regex("[COLUMN PREFIX].*"));

   // Iterator style
   try {
     for(Row row : bigtableDataClient.readRowsCallable().call(query)) {
       // Do something with row
     }
   } catch (NotFoundException e) {
     System.out.println("Tried to read a non-existent table");
   } catch (RuntimeException e) {
     e.printStackTrace();
   }

   // Sync style
   try {
     List<Row> rows = bigtableDataClient.readRowsCallable().all().call(query);
   } catch (NotFoundException e) {
     System.out.println("Tried to read a non-existent table");
   } catch (RuntimeException e) {
     e.printStackTrace();
   }

   // Point look up
   ApiFuture<Row> rowFuture = bigtableDataClient.readRowsCallable().first().futureCall(query);

   ApiFutures.addCallback(rowFuture, new ApiFutureCallback<Row>() {
     public void onFailure(Throwable t) {
       if (t instanceof NotFoundException) {
         System.out.println("Tried to read a non-existent table");
       } else {
         t.printStackTrace();
       }
     }
     public void onSuccess(Row result) {
       System.out.println("Got row: " + result);
     }
   }, MoreExecutors.directExecutor());

   // etc
 }
 

See Also:

For call styles., For query options., For the filter building DSL.

readRowsCallable

public <RowT> com.google.api.gax.rpc.ServerStreamingCallable<Query,RowT> readRowsCallable(RowAdapter<RowT> rowAdapter)

Streams back the results of the query. This callable allows for customization of the logical representation of a row. It's meant for advanced use cases.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   String tableId = "[TABLE]";

   Query query = Query.create(tableId)
          .range("[START KEY]", "[END KEY]")
          .filter(FILTERS.qualifier().regex("[COLUMN PREFIX].*"));

   // Iterator style
   try {
     for(CustomRow row : bigtableDataClient.readRowsCallable(new CustomRowAdapter()).call(query)) {
       // Do something with row
     }
   } catch (NotFoundException e) {
     System.out.println("Tried to read a non-existent table");
   } catch (RuntimeException e) {
     e.printStackTrace();
   }
 }
 

See Also:

For call styles., For query options., For the filter building DSL.

sampleRowKeys

public List<KeyOffset> sampleRowKeys(String tableId)

Convenience method to synchronously return a sample of row keys in the table. The returned row keys will delimit contiguous sections of the table of approximately equal size, which can be used to break up the data for distributed tasks like mapreduces.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   String tableId = "[TABLE_ID]";

   List<KeyOffset> keyOffsets = bigtableDataClient.sampleRowKeys(tableId);
   for(KeyOffset keyOffset : keyOffsets) {
   // Do something with keyOffset
   }
 } catch(ApiException e) {
   e.printStackTrace();
 }
 

Throws:

com.google.api.gax.rpc.ApiException - when a serverside error occurs

sampleRowKeysAsync

public com.google.api.core.ApiFuture<List<KeyOffset>> sampleRowKeysAsync(String tableId)

Convenience method to asynchronously return a sample of row keys in the table. The returned row keys will delimit contiguous sections of the table of approximately equal size, which can be used to break up the data for distributed tasks like mapreduces.

Sample code:

 try (BigtableClient bigtableDataClient = BigtableClient.create("[PROJECT]", "[INSTANCE]")) {
   ApiFuture<List<KeyOffset>> keyOffsetsFuture = bigtableClient.sampleRowKeysAsync("[TABLE]");

   ApiFutures.addCallback(keyOffsetsFuture, new ApiFutureCallback<List<KeyOffset>>() {
     public void onFailure(Throwable t) {
       if (t instanceof NotFoundException) {
         System.out.println("Tried to sample keys of a non-existent table");
       } else {
         t.printStackTrace();
       }
     }
     public void onSuccess(List<KeyOffset> keyOffsets) {
       System.out.println("Got key offsets: " + keyOffsets);
     }
   }, MoreExecutors.directExecutor());
 }
 

sampleRowKeysCallable

public com.google.api.gax.rpc.UnaryCallable<String,List<KeyOffset>> sampleRowKeysCallable()

Returns a sample of row keys in the table. The returned row keys will delimit contiguous sections of the table of approximately equal size, which can be used to break up the data for distributed tasks like mapreduces. The returned callable object allows for customization of api invocation.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   // Synchronous invocation
   try {
     List<KeyOffset> keyOffsets = bigtableDataClient.sampleRowKeysCallable().call("[TABLE]");
   } catch (NotFoundException e) {
     System.out.println("Tried to sample keys of a non-existent table");
   } catch (RuntimeException e) {
     e.printStackTrace();
   }

   // Asynchronous invocation
   ApiFuture<List<KeyOffset>> keyOffsetsFuture = bigtableDataClient.sampleRowKeysCallable().futureCall("[TABLE]");

   ApiFutures.addCallback(keyOffsetsFuture, new ApiFutureCallback<List<KeyOffset>>() {
     public void onFailure(Throwable t) {
       if (t instanceof NotFoundException) {
         System.out.println("Tried to sample keys of a non-existent table");
       } else {
         t.printStackTrace();
       }
     }
     public void onSuccess(List<KeyOffset> keyOffsets) {
       System.out.println("Got key offsets: " + keyOffsets);
     }
   }, MoreExecutors.directExecutor());
 }
 

mutateRow

public void mutateRow(RowMutation rowMutation)

Convenience method to synchronously mutate a single row atomically. Cells already present in the row are left unchanged unless explicitly changed by the RowMutation.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   RowMutation mutation = RowMutation.create("[TABLE]", "[ROW KEY]")
     .setCell("[FAMILY NAME]", "[QUALIFIER]", "[VALUE]");

   bigtableDataClient.mutateRow(mutation);
 } catch(ApiException e) {
   e.printStackTrace();
 }
 

Throws:

com.google.api.gax.rpc.ApiException - when a serverside error occurs

mutateRowAsync

public com.google.api.core.ApiFuture<Void> mutateRowAsync(RowMutation rowMutation)

Convenience method to asynchronously mutate a single row atomically. Cells already present in the row are left unchanged unless explicitly changed by the RowMutation.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   RowMutation mutation = RowMutation.create("[TABLE]", "[ROW KEY]")
     .setCell("[FAMILY NAME]", "[QUALIFIER]", "[VALUE]");

   ApiFuture<Void> future = bigtableDataClient.mutateRowAsync(mutation);

   ApiFutures.addCallback(future, new ApiFutureCallback<Void>() {
     public void onFailure(Throwable t) {
       if (t instanceof NotFoundException) {
         System.out.println("Tried to mutate a non-existent table");
       } else {
         t.printStackTrace();
       }
     }
     public void onSuccess(Void ignored) {
       System.out.println("Successfully applied mutation");
     }
   }, MoreExecutors.directExecutor());
 }
 

mutateRowCallable

public com.google.api.gax.rpc.UnaryCallable<RowMutation,Void> mutateRowCallable()

Mutates a single row atomically. Cells already present in the row are left unchanged unless explicitly changed by the RowMutation.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   RowMutation mutation = RowMutation.create("[TABLE]", "[ROW KEY]")
     .setCell("[FAMILY NAME]", "[QUALIFIER]", "[VALUE]");

   // Sync style
   try {
     bigtableDataClient.mutateRowCallable().call(mutation);
   } catch (NotFoundException e) {
     System.out.println("Tried to mutate a non-existent table");
   } catch (RuntimeException e) {
     e.printStackTrace();
   }
 }
 

bulkMutateRows

public void bulkMutateRows(BulkMutation mutation)

Convenience method to mutate multiple rows in a batch. Each individual row is mutated atomically as in MutateRow, but the entire batch is not executed atomically. This method expects the mutations to be pre-batched.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   BulkMutation batch = BulkMutation.create("[TABLE]");
   for (String someValue : someCollection) {
     batch.add("[ROW KEY]", Mutation.create().setCell("[FAMILY NAME]", "[QUALIFIER]", "[VALUE]"));
   }
   bigtableDataClient.bulkMutateRows(batch);
 } catch(ApiException e) {
   e.printStackTrace();
 } catch(MutateRowsException e) {
   e.printStackTrace();
 }
 

Throws:

com.google.api.gax.rpc.ApiException - when a serverside error occurs

MutateRowsException - if any of the entries failed to be applied

newBulkMutationBatcher

@BetaApi(value="This surface is likely to change as the batching surface evolves.")
public com.google.api.gax.batching.Batcher<RowMutationEntry,Void> newBulkMutationBatcher(@Nonnull
                                                                                                                                                                             String tableId)

Mutates multiple rows in a batch. Each individual row is mutated atomically as in MutateRow, but the entire batch is not executed atomically.

Sample Code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   try (Batcher<RowMutationEntry, Void> batcher = bigtableDataClient.newBulkMutationBatcher("[TABLE]")) {
     for (String someValue : someCollection) {
       ApiFuture<Void> entryFuture =
           batcher.add(
               RowMutationEntry.create("[ROW KEY]")
                   .setCell("[FAMILY NAME]", "[QUALIFIER]", "[VALUE]"));
     }

     // Blocks until mutations are applied on all submitted row entries.
     batcher.flush();
   }
   // Before `batcher` is closed, all remaining(If any) mutations are applied.
 }
 

bulkMutateRowsAsync

public com.google.api.core.ApiFuture<Void> bulkMutateRowsAsync(BulkMutation mutation)

Convenience method to mutate multiple rows in a batch. Each individual row is mutated atomically as in MutateRow, but the entire batch is not executed atomically. This method expects the mutations to be pre-batched.

Sample code:

 try (BigtableClient bigtableClient = BigtableClient.create("[PROJECT]", "[INSTANCE]")) {
   BulkMutation batch = BulkMutation.create("[TABLE]");
   for (String someValue : someCollection) {
     ApiFuture<Void> entryFuture = batch.add("[ROW KEY]",
       Mutation.create().setCell("[FAMILY NAME]", "[QUALIFIER]", "[VALUE]"));
   }
   ApiFuture<Void> resultFuture = bigtableDataClient.bulkMutateRowsAsync(batch);

   ApiFutures.addCallback(resultFuture, new ApiFutureCallback<Void>() {
     public void onFailure(Throwable t) {
       if (t instanceof BulkMutationFailure) {
         System.out.println("Some entries failed to apply");
       } else {
         t.printStackTrace();
       }
     }
     public void onSuccess(Void ignored) {
       System.out.println("Successfully applied all mutation");
     }
   }, MoreExecutors.directExecutor());
 }
 

bulkMutationCallable

public com.google.api.gax.rpc.UnaryCallable<BulkMutation,Void> bulkMutationCallable()

Mutates multiple rows in a batch. Each individual row is mutated atomically as in MutateRow, but the entire batch is not executed atomically. This method expects the mutations to be pre-batched.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   BulkMutation batch = BulkMutation.create("[TABLE]");
   for (String someValue : someCollection) {
     ApiFuture<Void> entryFuture = batch.add("[ROW KEY]",
       Mutation.create().setCell("[FAMILY NAME]", "[QUALIFIER]", "[VALUE]");
   }
   bigtableDataClient.bulkMutationCallable().call(batch);
 }
 

checkAndMutateRow

public Boolean checkAndMutateRow(ConditionalRowMutation mutation)

Convenience method to synchronously mutate a row atomically based on the output of a filter.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   ConditionalRowMutation mutation = ConditionalRowMutation.create("[TABLE]", "[KEY]")
     .condition(FILTERS.value().regex("old-value"))
     .then(
       Mutation.create()
         .setCell("[FAMILY]", "[QUALIFIER]", "[VALUE]")
       );

   Boolean result = bigtableDataClient.checkAndMutateRow(mutation);
 } catch(ApiException e) {
   e.printStackTrace();
 }
 

Throws:

com.google.api.gax.rpc.ApiException - when a serverside error occurs

checkAndMutateRowAsync

public com.google.api.core.ApiFuture<Boolean> checkAndMutateRowAsync(ConditionalRowMutation mutation)

Convenience method to asynchronously mutate a row atomically based on the output of a filter.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   ConditionalRowMutation mutation = ConditionalRowMutation.create("[TABLE]", "[KEY]")
     .condition(FILTERS.value().regex("old-value"))
     .then(
       Mutation.create()
         .setCell("[FAMILY]", "[QUALIFIER]", "[VALUE]")
       );

   ApiFuture<Boolean> future = bigtableDataClient.checkAndMutateRowAsync(mutation);

   ApiFutures.addCallback(future, new ApiFutureCallback<Boolean>() {
     public void onFailure(Throwable t) {
       if (t instanceof NotFoundException) {
         System.out.println("Tried to mutate a non-existent table");
       } else {
         t.printStackTrace();
       }
     }
     public void onSuccess(Boolean wasApplied) {
       System.out.println("Row was modified: " + wasApplied);
     }
   }, MoreExecutors.directExecutor());
 }
 

checkAndMutateRowCallable

public com.google.api.gax.rpc.UnaryCallable<ConditionalRowMutation,Boolean> checkAndMutateRowCallable()

Mutates a row atomically based on the output of a filter.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   ConditionalRowMutation mutation = ConditionalRowMutation.create("[TABLE]", "[KEY]")
     .condition(FILTERS.value().regex("old-value"))
     .then(
       Mutation.create()
         .setCell("[FAMILY]", "[QUALIFIER]", "[VALUE]")
       );

   // Sync style
   try {
     boolean success = bigtableDataClient.checkAndMutateRowCallable().call(mutation);
     if (!success) {
       System.out.println("Row did not match conditions");
     }
   } catch (NotFoundException e) {
     System.out.println("Tried to mutate a non-existent table");
   } catch (RuntimeException e) {
     e.printStackTrace();
   }
 }
 

readModifyWriteRow

public Row readModifyWriteRow(ReadModifyWriteRow mutation)

Convenience method that synchronously modifies a row atomically on the server. The method reads the latest existing timestamp and value from the specified columns and writes a new entry. The new value for the timestamp is the greater of the existing timestamp or the current server time. The method returns the new contents of all modified cells.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   ReadModifyWriteRow mutation = ReadModifyWriteRow.create("[TABLE]", "[KEY]")
     .increment("[FAMILY]", "[QUALIFIER]", 1)
     .append("[FAMILY2]", "[QUALIFIER2]", "suffix");

   Row success = bigtableDataClient.readModifyWriteRow(mutation);
 } catch(ApiException e) {
   e.printStackTrace();
 }
 

Throws:

com.google.api.gax.rpc.ApiException - when a serverside error occurs

readModifyWriteRowAsync

public com.google.api.core.ApiFuture<Row> readModifyWriteRowAsync(ReadModifyWriteRow mutation)

Convenience method that asynchronously modifies a row atomically on the server. The method reads the latest existing timestamp and value from the specified columns and writes a new entry. The new value for the timestamp is the greater of the existing timestamp or the current server time. The method returns the new contents of all modified cells.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   ReadModifyWriteRow mutation = ReadModifyWriteRow.create("[TABLE]", "[KEY]")
     .increment("[FAMILY]", "[QUALIFIER]", 1)
     .append("[FAMILY2]", "[QUALIFIER2]", "suffix");

   ApiFuture<Row> rowFuture = bigtableDataClient.readModifyWriteRowAsync(mutation);

   ApiFutures.addCallback(rowFuture, new ApiFutureCallback<Row>() {
     public void onFailure(Throwable t) {
       if (t instanceof NotFoundException) {
         System.out.println("Tried to mutate a non-existent table");
       } else {
         t.printStackTrace();
       }
     }
     public void onSuccess(Row resultingRow) {
       System.out.println("Resulting row: " + resultingRow);
     }
   }, MoreExecutors.directExecutor());
 }
 

readModifyWriteRowCallable

public com.google.api.gax.rpc.UnaryCallable<ReadModifyWriteRow,Row> readModifyWriteRowCallable()

Modifies a row atomically on the server. The method reads the latest existing timestamp and value from the specified columns and writes a new entry. The new value for the timestamp is the greater of the existing timestamp or the current server time. The method returns the new contents of all modified cells.

Sample code:

 try (BigtableDataClient bigtableDataClient = BigtableDataClient.create("[PROJECT]", "[INSTANCE]")) {
   ReadModifyWriteRow mutation = ReadModifyWriteRow.create("[TABLE]", "[KEY]")
     .increment("[FAMILY]", "[QUALIFIER]", 1)
     .append("[FAMILY2]", "[QUALIFIER2]", "suffix");

   try {
     Row row = bigtableDataClient.readModifyWriteRowCallable().call(mutation);
   } catch (NotFoundException e) {
     System.out.println("Tried to mutate a non-existent table");
   } catch (RuntimeException e) {
     e.printStackTrace();
   }
 }
 

close

public void close()

Close the clients and releases all associated resources.

Specified by:

close in interface AutoCloseable