org.apache.zeppelin.resource.DistributedResourcePool Maven / Gradle / Ivy
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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.zeppelin.resource;
/**
* distributed resource pool
*/
public class DistributedResourcePool extends LocalResourcePool {
private final ResourcePoolConnector connector;
public DistributedResourcePool(String id, ResourcePoolConnector connector) {
super(id);
this.connector = connector;
}
@Override
public Resource get(String name) {
return get(name, true);
}
@Override
public Resource get(String noteId, String paragraphId, String name) {
return get(noteId, paragraphId, name, true);
}
/**
* get resource by name.
* @param name
* @param remote false only return from local resource
* @return null if resource not found.
*/
public Resource get(String name, boolean remote) {
// try local first
Resource resource = super.get(name);
if (resource != null) {
return resource;
}
if (remote) {
ResourceSet resources = connector.getAllResources().filterByName(name);
if (resources.isEmpty()) {
return null;
} else {
// TODO(zjffdu) just assume there's no dupicated resources with the same name, but
// this assumption is false
return resources.get(0);
}
} else {
return null;
}
}
/**
* get resource by name.
* @param name
* @param remote false only return from local resource
* @return null if resource not found.
*/
public Resource get(String noteId, String paragraphId, String name, boolean remote) {
// try local first
Resource resource = super.get(noteId, paragraphId, name);
if (resource != null) {
return resource;
}
if (remote) {
ResourceSet resources = connector.getAllResources()
.filterByNoteId(noteId)
.filterByParagraphId(paragraphId)
.filterByName(name);
if (resources.isEmpty()) {
return null;
} else {
return resources.get(0);
}
} else {
return null;
}
}
@Override
public ResourceSet getAll() {
return getAll(true);
}
/**
* Get all resource from the pool
* @param remote false only return local resource
* @return
*/
public ResourceSet getAll(boolean remote) {
ResourceSet all = super.getAll();
if (remote) {
all.addAll(connector.getAllResources());
}
return all;
}
}