| /* |
| * 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.cassandra.repair.state; |
| |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import com.google.common.base.Throwables; |
| |
| import org.apache.cassandra.utils.Clock; |
| |
| public class AbstractCompletable<I> implements Completable<I> |
| { |
| private final long creationTimeMillis = Clock.Global.currentTimeMillis(); // used to convert from nanos to millis |
| private final long creationTimeNanos = Clock.Global.nanoTime(); |
| private final AtomicReference<Result> result = new AtomicReference<>(null); |
| public final I id; |
| protected volatile long lastUpdatedAtNs; |
| |
| public AbstractCompletable(I id) |
| { |
| this.id = id; |
| } |
| |
| @Override |
| public I getId() |
| { |
| return id; |
| } |
| |
| @Override |
| public long getInitializedAtMillis() |
| { |
| return nanosToMillis(creationTimeNanos); |
| } |
| |
| @Override |
| public long getInitializedAtNanos() |
| { |
| return creationTimeNanos; |
| } |
| |
| @Override |
| public long getLastUpdatedAtMillis() |
| { |
| return nanosToMillis(lastUpdatedAtNs); |
| } |
| |
| @Override |
| public long getLastUpdatedAtNanos() |
| { |
| return lastUpdatedAtNs; |
| } |
| |
| @Override |
| public Result getResult() |
| { |
| return result.get(); |
| } |
| |
| public void updated() |
| { |
| lastUpdatedAtNs = Clock.Global.nanoTime(); |
| } |
| |
| protected boolean tryResult(Result result) |
| { |
| if (!this.result.compareAndSet(null, result)) |
| return false; |
| onComplete(); |
| lastUpdatedAtNs = Clock.Global.nanoTime(); |
| return true; |
| } |
| |
| protected void onComplete() {} |
| |
| protected long nanosToMillis(long nanos) |
| { |
| // nanos - creationTimeNanos = delta since init |
| return creationTimeMillis + TimeUnit.NANOSECONDS.toMillis(nanos - creationTimeNanos); |
| } |
| |
| protected class BaseSkipPhase extends BasePhase |
| { |
| public void skip(String msg) |
| { |
| tryResult(Result.skip(msg)); |
| } |
| } |
| |
| protected class BasePhase |
| { |
| public void success() |
| { |
| tryResult(Result.success()); |
| } |
| |
| public void success(String msg) |
| { |
| tryResult(Result.success(msg)); |
| } |
| |
| public void fail(Throwable e) |
| { |
| fail(e == null ? null : Throwables.getStackTraceAsString(e)); |
| } |
| |
| public void fail(String failureCause) |
| { |
| tryResult(Result.fail(failureCause)); |
| } |
| } |
| } |