org.apache.hadoop.hbase.protobuf.ResponseConverter Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.hbase.protobuf;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import edu.umd.cs.findbugs.annotations.Nullable;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellScanner;
import org.apache.hadoop.hbase.DoNotRetryIOException;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.ipc.ServerRpcController;
import org.apache.hadoop.hbase.protobuf.generated.AccessControlProtos.GetUserPermissionsResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.CloseRegionResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.GetOnlineRegionResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.GetServerInfoResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.OpenRegionResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.ServerInfo;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MultiRequest;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.RegionAction;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.RegionActionResult;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ResultOrException;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ScanResponse;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MultiResponse;
import org.apache.hadoop.hbase.protobuf.generated.ClusterStatusProtos.RegionStoreSequenceIds;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.NameBytesPair;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.NameInt64Pair;
import org.apache.hadoop.hbase.protobuf.generated.MapReduceProtos.ScanMetrics;
import org.apache.hadoop.hbase.protobuf.generated.MasterProtos.EnableCatalogJanitorResponse;
import org.apache.hadoop.hbase.protobuf.generated.MasterProtos.RunCatalogScanResponse;
import org.apache.hadoop.hbase.protobuf.generated.MasterProtos.RunCleanerChoreResponse;
import org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos.GetLastFlushedSequenceIdResponse;
import org.apache.hadoop.hbase.regionserver.RegionOpeningState;
import org.apache.hadoop.hbase.security.access.UserPermission;
import org.apache.hadoop.util.StringUtils;
import com.google.protobuf.ByteString;
import com.google.protobuf.RpcController;
/**
* Helper utility to build protocol buffer responses,
* or retrieve data from protocol buffer responses.
*/
@InterfaceAudience.Private
public final class ResponseConverter {
private static final Log LOG = LogFactory.getLog(ResponseConverter.class);
private ResponseConverter() {
}
// Start utilities for Client
/**
* Get the results from a protocol buffer MultiResponse
*
* @param request the original protocol buffer MultiRequest
* @param response the protocol buffer MultiResponse to convert
* @param cells Cells to go with the passed in proto. Can be null.
* @return the results that were in the MultiResponse (a Result or an Exception).
* @throws IOException
*/
public static org.apache.hadoop.hbase.client.MultiResponse getResults(final MultiRequest request,
final MultiResponse response, final CellScanner cells)
throws IOException {
return getResults(request, null, response, cells);
}
/**
* Get the results from a protocol buffer MultiResponse
*
* @param request the original protocol buffer MultiRequest
* @param rowMutationsIndexMap
* @param response the protocol buffer MultiResponse to convert
* @param cells Cells to go with the passed in proto. Can be null.
* @return the results that were in the MultiResponse (a Result or an Exception).
* @throws IOException
*/
public static org.apache.hadoop.hbase.client.MultiResponse getResults(final MultiRequest request,
Map rowMutationsIndexMap, final MultiResponse response, final CellScanner cells)
throws IOException {
int requestRegionActionCount = request.getRegionActionCount();
int responseRegionActionResultCount = response.getRegionActionResultCount();
if (requestRegionActionCount != responseRegionActionResultCount) {
throw new IllegalStateException("Request mutation count=" + requestRegionActionCount +
" does not match response mutation result count=" + responseRegionActionResultCount);
}
org.apache.hadoop.hbase.client.MultiResponse results =
new org.apache.hadoop.hbase.client.MultiResponse();
for (int i = 0; i < responseRegionActionResultCount; i++) {
RegionAction actions = request.getRegionAction(i);
RegionActionResult actionResult = response.getRegionActionResult(i);
HBaseProtos.RegionSpecifier rs = actions.getRegion();
if (rs.hasType() &&
(rs.getType() != HBaseProtos.RegionSpecifier.RegionSpecifierType.REGION_NAME)){
throw new IllegalArgumentException(
"We support only encoded types for protobuf multi response.");
}
byte[] regionName = rs.getValue().toByteArray();
if (actionResult.hasException()) {
Throwable regionException = ProtobufUtil.toException(actionResult.getException());
results.addException(regionName, regionException);
continue;
}
if (actions.getActionCount() != actionResult.getResultOrExceptionCount()) {
throw new IllegalStateException("actions.getActionCount=" + actions.getActionCount() +
", actionResult.getResultOrExceptionCount=" +
actionResult.getResultOrExceptionCount() + " for region " + actions.getRegion());
}
Object responseValue;
Integer rowMutationsIndex =
(rowMutationsIndexMap == null ? null : rowMutationsIndexMap.get(i));
if (rowMutationsIndex != null) {
// This RegionAction is from a RowMutations in a batch.
// If there is an exception from the server, the exception is set at
// the RegionActionResult level, which has been handled above.
responseValue = response.getProcessed() ?
ProtobufUtil.EMPTY_RESULT_EXISTS_TRUE :
ProtobufUtil.EMPTY_RESULT_EXISTS_FALSE;
results.add(regionName, rowMutationsIndex, responseValue);
continue;
}
for (ResultOrException roe : actionResult.getResultOrExceptionList()) {
if (roe.hasException()) {
responseValue = ProtobufUtil.toException(roe.getException());
} else if (roe.hasResult()) {
responseValue = ProtobufUtil.toResult(roe.getResult(), cells);
} else if (roe.hasServiceResult()) {
responseValue = roe.getServiceResult();
} else{
// Sometimes, the response is just "it was processed". Generally, this occurs for things
// like mutateRows where either we get back 'processed' (or not) and optionally some
// statistics about the regions we touched.
responseValue = response.getProcessed() ?
ProtobufUtil.EMPTY_RESULT_EXISTS_TRUE :
ProtobufUtil.EMPTY_RESULT_EXISTS_FALSE;
}
results.add(regionName, roe.getIndex(), responseValue);
}
}
if (response.hasRegionStatistics()) {
ClientProtos.MultiRegionLoadStats stats = response.getRegionStatistics();
for (int i = 0; i < stats.getRegionCount(); i++) {
results.addStatistic(stats.getRegion(i).getValue().toByteArray(), stats.getStat(i));
}
}
return results;
}
/**
* Wrap a throwable to an action result.
*
* @param t
* @return an action result builder
*/
public static ResultOrException.Builder buildActionResult(final Throwable t) {
ResultOrException.Builder builder = ResultOrException.newBuilder();
if (t != null) builder.setException(buildException(t));
return builder;
}
/**
* Wrap a throwable to an action result.
*
* @param r
* @return an action result builder
*/
public static ResultOrException.Builder buildActionResult(final ClientProtos.Result r) {
ResultOrException.Builder builder = ResultOrException.newBuilder();
if (r != null) builder.setResult(r);
return builder;
}
/**
* @param t
* @return NameValuePair of the exception name to stringified version os exception.
*/
public static NameBytesPair buildException(final Throwable t) {
NameBytesPair.Builder parameterBuilder = NameBytesPair.newBuilder();
parameterBuilder.setName(t.getClass().getName());
parameterBuilder.setValue(
ByteString.copyFromUtf8(StringUtils.stringifyException(t)));
return parameterBuilder.build();
}
/**
* Converts the permissions list into a protocol buffer GetUserPermissionsResponse
*/
public static GetUserPermissionsResponse buildGetUserPermissionsResponse(
final List permissions) {
GetUserPermissionsResponse.Builder builder = GetUserPermissionsResponse.newBuilder();
for (UserPermission perm : permissions) {
builder.addUserPermission(ProtobufUtil.toUserPermission(perm));
}
return builder.build();
}
// End utilities for Client
// Start utilities for Admin
/**
* Get the list of region info from a GetOnlineRegionResponse
*
* @param proto the GetOnlineRegionResponse
* @return the list of region info
*/
public static List getRegionInfos(final GetOnlineRegionResponse proto) {
if (proto == null || proto.getRegionInfoCount() == 0) return null;
return ProtobufUtil.getRegionInfos(proto);
}
/**
* Get the region opening state from a OpenRegionResponse
*
* @param proto the OpenRegionResponse
* @return the region opening state
*/
public static RegionOpeningState getRegionOpeningState
(final OpenRegionResponse proto) {
if (proto == null || proto.getOpeningStateCount() != 1) return null;
return RegionOpeningState.valueOf(
proto.getOpeningState(0).name());
}
/**
* Get a list of region opening state from a OpenRegionResponse
*
* @param proto the OpenRegionResponse
* @return the list of region opening state
*/
public static List getRegionOpeningStateList(
final OpenRegionResponse proto) {
if (proto == null) return null;
List regionOpeningStates = new ArrayList();
for (int i = 0; i < proto.getOpeningStateCount(); i++) {
regionOpeningStates.add(RegionOpeningState.valueOf(
proto.getOpeningState(i).name()));
}
return regionOpeningStates;
}
/**
* Check if the region is closed from a CloseRegionResponse
*
* @param proto the CloseRegionResponse
* @return the region close state
*/
public static boolean isClosed
(final CloseRegionResponse proto) {
if (proto == null || !proto.hasClosed()) return false;
return proto.getClosed();
}
/**
* A utility to build a GetServerInfoResponse.
*
* @param serverName
* @param webuiPort
* @return the response
*/
public static GetServerInfoResponse buildGetServerInfoResponse(
final ServerName serverName, final int webuiPort) {
GetServerInfoResponse.Builder builder = GetServerInfoResponse.newBuilder();
ServerInfo.Builder serverInfoBuilder = ServerInfo.newBuilder();
serverInfoBuilder.setServerName(ProtobufUtil.toServerName(serverName));
if (webuiPort >= 0) {
serverInfoBuilder.setWebuiPort(webuiPort);
}
builder.setServerInfo(serverInfoBuilder.build());
return builder.build();
}
/**
* A utility to build a GetOnlineRegionResponse.
*
* @param regions
* @return the response
*/
public static GetOnlineRegionResponse buildGetOnlineRegionResponse(
final List regions) {
GetOnlineRegionResponse.Builder builder = GetOnlineRegionResponse.newBuilder();
for (HRegionInfo region: regions) {
builder.addRegionInfo(HRegionInfo.convert(region));
}
return builder.build();
}
/**
* Creates a response for the catalog scan request
* @return A RunCatalogScanResponse
*/
public static RunCatalogScanResponse buildRunCatalogScanResponse(int numCleaned) {
return RunCatalogScanResponse.newBuilder().setScanResult(numCleaned).build();
}
/**
* Creates a response for the catalog scan request
* @return A EnableCatalogJanitorResponse
*/
public static EnableCatalogJanitorResponse buildEnableCatalogJanitorResponse(boolean prevValue) {
return EnableCatalogJanitorResponse.newBuilder().setPrevValue(prevValue).build();
}
/**
* Creates a response for the cleaner chore request
* @return A RunCleanerChoreResponse
*/
public static RunCleanerChoreResponse buildRunCleanerChoreResponse(boolean ran) {
return RunCleanerChoreResponse.newBuilder().setCleanerChoreRan(ran).build();
}
// End utilities for Admin
/**
* Creates a response for the last flushed sequence Id request
* @return A GetLastFlushedSequenceIdResponse
*/
public static GetLastFlushedSequenceIdResponse buildGetLastFlushedSequenceIdResponse(
RegionStoreSequenceIds ids) {
return GetLastFlushedSequenceIdResponse.newBuilder()
.setLastFlushedSequenceId(ids.getLastFlushedSequenceId())
.addAllStoreLastFlushedSequenceId(ids.getStoreSequenceIdList()).build();
}
/**
* Stores an exception encountered during RPC invocation so it can be passed back
* through to the client.
* @param controller the controller instance provided by the client when calling the service
* @param ioe the exception encountered
*/
public static void setControllerException(RpcController controller, IOException ioe) {
if (controller != null) {
if (controller instanceof ServerRpcController) {
((ServerRpcController)controller).setFailedOn(ioe);
} else {
controller.setFailed(StringUtils.stringifyException(ioe));
}
}
}
/**
* Retreivies exception stored during RPC invocation.
* @param controller the controller instance provided by the client when calling the service
* @return exception if any, or null; Will return DoNotRetryIOException for string represented
* failure causes in controller.
*/
@Nullable
public static IOException getControllerException(RpcController controller) throws IOException {
if (controller != null && controller.failed()) {
if (controller instanceof ServerRpcController) {
return ((ServerRpcController)controller).getFailedOn();
} else {
return new DoNotRetryIOException(controller.errorText());
}
}
return null;
}
/**
* Create Results from the cells using the cells meta data.
* @param cellScanner
* @param response
* @return results
*/
public static Result[] getResults(CellScanner cellScanner, ScanResponse response)
throws IOException {
if (response == null) return null;
// If cellscanner, then the number of Results to return is the count of elements in the
// cellsPerResult list. Otherwise, it is how many results are embedded inside the response.
int noOfResults = cellScanner != null?
response.getCellsPerResultCount(): response.getResultsCount();
Result[] results = new Result[noOfResults];
for (int i = 0; i < noOfResults; i++) {
if (cellScanner != null) {
// Cells are out in cellblocks. Group them up again as Results. How many to read at a
// time will be found in getCellsLength -- length here is how many Cells in the i'th Result
int noOfCells = response.getCellsPerResult(i);
boolean isPartial =
response.getPartialFlagPerResultCount() > i ?
response.getPartialFlagPerResult(i) : false;
List cells = new ArrayList(noOfCells);
for (int j = 0; j < noOfCells; j++) {
try {
if (cellScanner.advance() == false) {
// We are not able to retrieve the exact number of cells which ResultCellMeta says us.
// We have to scan for the same results again. Throwing DNRIOE as a client retry on the
// same scanner will result in OutOfOrderScannerNextException
String msg = "Results sent from server=" + noOfResults + ". But only got " + i
+ " results completely at client. Resetting the scanner to scan again.";
LOG.error(msg);
throw new DoNotRetryIOException(msg);
}
} catch (IOException ioe) {
// We are getting IOE while retrieving the cells for Results.
// We have to scan for the same results again. Throwing DNRIOE as a client retry on the
// same scanner will result in OutOfOrderScannerNextException
LOG.error("Exception while reading cells from result."
+ "Resetting the scanner to scan again.", ioe);
throw new DoNotRetryIOException("Resetting the scanner.", ioe);
}
cells.add(cellScanner.current());
}
results[i] = Result.create(cells, null, response.getStale(), isPartial);
} else {
// Result is pure pb.
results[i] = ProtobufUtil.toResult(response.getResults(i));
}
}
return results;
}
public static Map getScanMetrics(ScanResponse response) {
Map metricMap = new HashMap();
if (response == null || !response.hasScanMetrics()) {
return metricMap;
}
ScanMetrics metrics = response.getScanMetrics();
int numberOfMetrics = metrics.getMetricsCount();
for (int i = 0; i < numberOfMetrics; i++) {
NameInt64Pair metricPair = metrics.getMetrics(i);
if (metricPair != null) {
String name = metricPair.getName();
Long value = metricPair.getValue();
if (name != null && value != null) {
metricMap.put(name, value);
}
}
}
return metricMap;
}
}
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