/**
* 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.hive.ql.hooks;
import java.util.Arrays;
import java.io.IOException;
import org.apache.hadoop.hive.common.FileUtils;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hive.ql.session.SessionState;
// This hook verifies that the location of every output table is empty
public class VerifyTableDirectoryIsEmptyHook implements ExecuteWithHookContext {
public void run(HookContext hookContext) throws IOException {
for (WriteEntity output : hookContext.getOutputs()) {
Path tableLocation = new Path(output.getTable().getDataLocation().toString());
FileSystem fs = tableLocation.getFileSystem(SessionState.get().getConf());
assert(fs.listStatus(tableLocation, FileUtils.HIDDEN_FILES_PATH_FILTER).length == 0);
}
}
}