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NIFI-13937 Add command pg-empty-queues to NiFi CLI (#9459)
Signed-off-by: David Handermann <[email protected]>
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...kit-cli/src/main/java/org/apache/nifi/toolkit/cli/impl/command/nifi/pg/PGEmptyQueues.java
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| /* | ||
| * 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.nifi.toolkit.cli.impl.command.nifi.pg; | ||
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| import org.apache.commons.cli.MissingOptionException; | ||
| import org.apache.nifi.toolkit.cli.api.Context; | ||
| import org.apache.nifi.toolkit.cli.impl.client.nifi.NiFiClient; | ||
| import org.apache.nifi.toolkit.cli.impl.client.nifi.NiFiClientException; | ||
| import org.apache.nifi.toolkit.cli.impl.client.nifi.ProcessGroupClient; | ||
| import org.apache.nifi.toolkit.cli.impl.command.CommandOption; | ||
| import org.apache.nifi.toolkit.cli.impl.command.nifi.AbstractNiFiCommand; | ||
| import org.apache.nifi.toolkit.cli.impl.result.VoidResult; | ||
| import org.apache.nifi.web.api.entity.DropRequestEntity; | ||
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| import java.io.IOException; | ||
| import java.util.Properties; | ||
|
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| /** | ||
| * Command to stop the components of a process group. | ||
| */ | ||
| public class PGEmptyQueues extends AbstractNiFiCommand<VoidResult> { | ||
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| public static final int MAX_ITERATIONS = 20; | ||
| public static final long DELAY_MS = 1000; | ||
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| public PGEmptyQueues() { | ||
| super("pg-empty-queues", VoidResult.class); | ||
| } | ||
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| @Override | ||
| public String getDescription() { | ||
| return "Empty all queues, recursively, in the specified Process Group. It is recommended to first use pg-stop."; | ||
| } | ||
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| @Override | ||
| protected void doInitialize(final Context context) { | ||
| addOption(CommandOption.PG_ID.createOption()); | ||
| } | ||
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| @Override | ||
| public VoidResult doExecute(final NiFiClient client, final Properties properties) | ||
| throws NiFiClientException, IOException, MissingOptionException { | ||
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| final String pgId = getRequiredArg(properties, CommandOption.PG_ID); | ||
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| final ProcessGroupClient pgClient = client.getProcessGroupClient(); | ||
| DropRequestEntity requestEntity = pgClient.emptyQueues(pgId); | ||
| final String requestId = requestEntity.getDropRequest().getId(); | ||
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| int iterations = 1; | ||
| while (!requestEntity.getDropRequest().isFinished() && iterations < MAX_ITERATIONS) { | ||
| if (shouldPrint(properties)) { | ||
| println("Emptying queues, currently at " + requestEntity.getDropRequest().getPercentCompleted() + "% (" | ||
| + iterations + " of " + MAX_ITERATIONS + ")..."); | ||
| } | ||
| sleep(DELAY_MS); | ||
| iterations++; | ||
| requestEntity = pgClient.getEmptyQueuesRequest(pgId, requestId); | ||
| } | ||
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| if (shouldPrint(properties)) { | ||
| if (requestEntity.getDropRequest().isFinished()) { | ||
| println("Drop request completed. Deleted: " + requestEntity.getDropRequest().getDropped()); | ||
| } else { | ||
| println("Drop request didn't complete yet. Thus far, deleted: " + requestEntity.getDropRequest().getDropped()); | ||
| } | ||
| } | ||
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| return VoidResult.getInstance(); | ||
| } | ||
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| private boolean shouldPrint(final Properties properties) { | ||
| return isInteractive() || isVerbose(properties); | ||
| } | ||
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| private void sleep(long millis) { | ||
| try { | ||
| Thread.sleep(millis); | ||
| } catch (InterruptedException e) { | ||
| Thread.interrupted(); | ||
| } | ||
| } | ||
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|
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| } |