Aaron Kruglikov
Committed by Gerrit Code Review

Adding consistent document tree.

Change-Id: I5a70daf3cec7fa83f063bdcb82e1bf38b75419b1
......@@ -35,4 +35,30 @@ public class DocumentException extends RuntimeException {
public DocumentException(Throwable cause) {
super(cause);
}
/**
* DocumentTree operation timeout.
*/
public static class Timeout extends DocumentException {
public Timeout() {
}
public Timeout(String message) {
super(message);
}
public Timeout(String message, Throwable cause) {
super(message, cause);
}
public Timeout(Throwable cause) {
super(cause);
}
}
/**
* DocumentTree operation interrupted.
*/
public static class Interrupted extends DocumentException {
}
}
......
/*
* Copyright 2016 Open Networking Laboratory
*
* 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.
*/
package org.onosproject.store.primitives.resources.impl;
import com.google.common.base.Throwables;
import org.onosproject.store.service.AsyncDocumentTree;
import org.onosproject.store.service.ConsistentMapException;
import org.onosproject.store.service.DocumentException;
import org.onosproject.store.service.DocumentPath;
import org.onosproject.store.service.DocumentTree;
import org.onosproject.store.service.DocumentTreeListener;
import org.onosproject.store.service.Synchronous;
import org.onosproject.store.service.Versioned;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
/**
* Synchronous wrapper for a {@link AsyncDocumentTree}. All operations are
* made by making the equivalent calls to a backing {@link AsyncDocumentTree}
* then blocking until the operations complete or timeout.
*
* @param <V> the type of the values
*/
public class DefaultConsistentDocumentTree<V> extends Synchronous<AsyncDocumentTree<V>> implements DocumentTree<V> {
private final AsyncDocumentTree<V> backingMap;
private static final int MAX_DELAY_BETWEEN_RETRY_MILLS = 50;
private final long operationTimeoutMillis;
public DefaultConsistentDocumentTree(AsyncDocumentTree<V> backingMap,
long operationTimeoutMillis) {
super(backingMap);
this.backingMap = backingMap;
this.operationTimeoutMillis = operationTimeoutMillis;
}
@Override
public DocumentPath root() {
return backingMap.root();
}
@Override
public Map<String, Versioned<V>> getChildren(DocumentPath path) {
return complete(backingMap.getChildren(path));
}
@Override
public Versioned<V> get(DocumentPath path) {
return complete(backingMap.get(path));
}
@Override
public Versioned<V> set(DocumentPath path, V value) {
return complete(backingMap.set(path, value));
}
@Override
public boolean create(DocumentPath path, V value) {
return complete(backingMap.create(path, value));
}
@Override
public boolean createRecursive(DocumentPath path, V value) {
return complete(backingMap.createRecursive(path, value));
}
@Override
public boolean replace(DocumentPath path, V newValue, long version) {
return complete(backingMap.replace(path, newValue, version));
}
@Override
public boolean replace(DocumentPath path, V newValue, V currentValue) {
return complete(backingMap.replace(path, newValue, currentValue));
}
@Override
public Versioned<V> removeNode(DocumentPath path) {
return complete(backingMap.removeNode(path));
}
@Override
public void addListener(DocumentPath path, DocumentTreeListener<V> listener) {
complete(backingMap.addListener(path, listener));
}
@Override
public void removeListener(DocumentTreeListener<V> listener) {
complete(backingMap.removeListener(listener));
}
@Override
public void addListener(DocumentTreeListener<V> listener) {
complete(backingMap.addListener(listener));
}
private <T> T complete(CompletableFuture<T> future) {
try {
return future.get(operationTimeoutMillis, TimeUnit.MILLISECONDS);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new DocumentException.Interrupted();
} catch (TimeoutException e) {
throw new DocumentException.Timeout(name());
} catch (ExecutionException e) {
Throwables.propagateIfPossible(e.getCause());
throw new ConsistentMapException(e.getCause());
}
}
}