yanxinyi commented on a change in pull request #972: URL: https://github.com/apache/phoenix/pull/972#discussion_r530085070
########## File path: phoenix-core/src/main/java/org/apache/phoenix/coprocessor/SyscatRegionObserver.java ########## @@ -0,0 +1,54 @@ +/* + * 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.phoenix.coprocessor; + +import org.apache.hadoop.hbase.CoprocessorEnvironment; +import org.apache.hadoop.hbase.client.Scan; +import org.apache.hadoop.hbase.coprocessor.BaseRegionObserver; +import org.apache.hadoop.hbase.coprocessor.ObserverContext; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment; +import org.apache.hadoop.hbase.regionserver.RegionScanner; +import org.apache.phoenix.filter.SyscatViewIndexIdFilter; +import org.apache.phoenix.util.ScanUtil; + +import java.io.IOException; + +import static org.apache.phoenix.util.ScanUtil.UNKNOWN_CLIENT_VERSION; + +/** + * Coprocessor that checks whether the VIEW_INDEX_ID needs to retrieve. + */ +public class SyscatRegionObserver extends BaseRegionObserver { + @Override public void start(CoprocessorEnvironment e) throws IOException { + super.start(e); + } + + @Override public void stop(CoprocessorEnvironment e) throws IOException { + super.stop(e); + } + + @Override + public RegionScanner preScannerOpen(ObserverContext<RegionCoprocessorEnvironment> e, Scan scan, + RegionScanner s) throws IOException { + int clientVersion = ScanUtil.getClientVersion(scan); + if (clientVersion != UNKNOWN_CLIENT_VERSION) { Review comment: since corpoc is not only for the phoenix, but it also works for the HBase. We don't want to change the behavior other than the Phoenix environment. The ScanUtil.getClientVersion returns UNKNOWN_CLIENT_VERSION if the phoenix client version is not setup. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
