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Return and accept command topic offsets via REST API (#2159)
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70 changes: 70 additions & 0 deletions
70
...rest-app/src/main/java/io/confluent/ksql/rest/server/computation/CommandStatusFuture.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| /* | ||
| * Copyright 2018 Confluent Inc. | ||
| * | ||
| * Licensed 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. | ||
| */ | ||
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|
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| package io.confluent.ksql.rest.server.computation; | ||
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| import io.confluent.ksql.rest.entity.CommandStatus; | ||
| import java.time.Duration; | ||
| import java.util.Objects; | ||
| import java.util.concurrent.CompletableFuture; | ||
| import java.util.concurrent.ExecutionException; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.concurrent.TimeoutException; | ||
|
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| public class CommandStatusFuture { | ||
| private static final CommandStatus INITIAL_STATUS = new CommandStatus( | ||
| CommandStatus.Status.QUEUED, "Statement written to command topic"); | ||
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| private final CommandId commandId; | ||
| private volatile CommandStatus currentStatus; | ||
| private final CompletableFuture<CommandStatus> finalStatusFuture; | ||
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| public CommandStatusFuture(final CommandId commandId) { | ||
| this.commandId = Objects.requireNonNull(commandId, "commandId cannot be null"); | ||
| this.currentStatus = INITIAL_STATUS; | ||
| this.finalStatusFuture = new CompletableFuture<>(); | ||
| } | ||
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| CommandId getCommandId() { | ||
| return commandId; | ||
| } | ||
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| CommandStatus getStatus() { | ||
| return currentStatus; | ||
| } | ||
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| CommandStatus tryWaitForFinalStatus(final Duration timeout) throws InterruptedException { | ||
| try { | ||
| return finalStatusFuture.get(timeout.toMillis(), TimeUnit.MILLISECONDS); | ||
| } catch (final ExecutionException e) { | ||
| if (e.getCause() instanceof RuntimeException) { | ||
| throw (RuntimeException)e.getCause(); | ||
| } | ||
| throw new RuntimeException("Error executing command " + commandId, e.getCause()); | ||
| } catch (final TimeoutException e) { | ||
| return currentStatus; | ||
| } | ||
| } | ||
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| void setStatus(final CommandStatus status) { | ||
| this.currentStatus = Objects.requireNonNull(status); | ||
| } | ||
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| void setFinalStatus(final CommandStatus status) { | ||
| setStatus(status); | ||
| finalStatusFuture.complete(status); | ||
| } | ||
| } |
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