Examples with RegionServerCallable org.apache.hadoop.hbase.client.RegionServerCallable used on opensource projects

Example 1 with RegionServerCallable

use of org.apache.hadoop.hbase.client.RegionServerCallable in project hbase by apache.

the class MetaTableAccessor method multiMutate.

/**
   * Performs an atomic multi-mutate operation against the given table.
   */
// Used by the RSGroup Coprocessor Endpoint. It had a copy/paste of the below. Need to reveal
// this facility for CPEP use or at least those CPEPs that are on their way to becoming part of
// core as is the intent for RSGroup eventually.
public static void multiMutate(Connection connection, final Table table, byte[] row, final List<Mutation> mutations) throws IOException {
    if (METALOG.isDebugEnabled()) {
        METALOG.debug(mutationsToString(mutations));
    }
    // TODO: Need rollback!!!!
    // TODO: Need Retry!!!
    // TODO: What for a timeout? Default write timeout? GET FROM HTABLE?
    // TODO: Review when we come through with ProcedureV2.
    RegionServerCallable<MutateRowsResponse, MultiRowMutationProtos.MultiRowMutationService.BlockingInterface> callable = new RegionServerCallable<MutateRowsResponse, MultiRowMutationProtos.MultiRowMutationService.BlockingInterface>(connection, table.getName(), row, null) {

        /*RpcController not used in this CPEP!*/
        @Override
        protected MutateRowsResponse rpcCall() throws Exception {
            final MutateRowsRequest.Builder builder = MutateRowsRequest.newBuilder();
            for (Mutation mutation : mutations) {
                if (mutation instanceof Put) {
                    builder.addMutationRequest(ProtobufUtil.toMutation(ClientProtos.MutationProto.MutationType.PUT, mutation));
                } else if (mutation instanceof Delete) {
                    builder.addMutationRequest(ProtobufUtil.toMutation(ClientProtos.MutationProto.MutationType.DELETE, mutation));
                } else {
                    throw new DoNotRetryIOException("multi in MetaEditor doesn't support " + mutation.getClass().getName());
                }
            }
            // The call to #prepare that ran before this invocation will have populated HRegionLocation.
            HRegionLocation hrl = getLocation();
            RegionSpecifier region = ProtobufUtil.buildRegionSpecifier(RegionSpecifierType.REGION_NAME, hrl.getRegionInfo().getRegionName());
            builder.setRegion(region);
            // that makes com.google.protobuf.RpcController and then copy into it configs.
            return getStub().mutateRows(null, builder.build());
        }

        @Override
        protected // Called on the end of the super.prepare call. Set the stub.
        void setStubByServiceName(ServerName serviceName) throws /*Ignored*/
        IOException {
            CoprocessorRpcChannel channel = table.coprocessorService(getRow());
            setStub(MultiRowMutationProtos.MultiRowMutationService.newBlockingStub(channel));
        }
    };
    int writeTimeout = connection.getConfiguration().getInt(HConstants.HBASE_RPC_WRITE_TIMEOUT_KEY, connection.getConfiguration().getInt(HConstants.HBASE_RPC_TIMEOUT_KEY, HConstants.DEFAULT_HBASE_RPC_TIMEOUT));
    // The region location should be cached in connection. Call prepare so this callable picks
    // up the region location (see super.prepare method).
    callable.prepare(false);
    callable.call(writeTimeout);
}