/**
* 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.hadoop.yarn.api.protocolrecords.impl.pb;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.hadoop.yarn.api.protocolrecords.GetAllApplicationsResponse;
import org.apache.hadoop.yarn.api.records.ApplicationReport;
import org.apache.hadoop.yarn.api.records.ProtoBase;
import org.apache.hadoop.yarn.api.records.impl.pb.ApplicationReportPBImpl;
import org.apache.hadoop.yarn.proto.YarnProtos.ApplicationReportProto;
import org.apache.hadoop.yarn.proto.YarnServiceProtos.GetAllApplicationsResponseProto;
import org.apache.hadoop.yarn.proto.YarnServiceProtos.GetAllApplicationsResponseProtoOrBuilder;
public class GetAllApplicationsResponsePBImpl
extends ProtoBase<GetAllApplicationsResponseProto> implements
GetAllApplicationsResponse {
GetAllApplicationsResponseProto proto =
GetAllApplicationsResponseProto.getDefaultInstance();
GetAllApplicationsResponseProto.Builder builder = null;
boolean viaProto = false;
List<ApplicationReport> applicationList;
public GetAllApplicationsResponsePBImpl() {
builder = GetAllApplicationsResponseProto.newBuilder();
}
public GetAllApplicationsResponsePBImpl(GetAllApplicationsResponseProto proto) {
this.proto = proto;
viaProto = true;
}
@Override
public List<ApplicationReport> getApplicationList() {
initLocalApplicationsList();
return this.applicationList;
}
@Override
public void setApplicationList(List<ApplicationReport> applications) {
maybeInitBuilder();
if (applications == null)
builder.clearApplications();
this.applicationList = applications;
}
@Override
public GetAllApplicationsResponseProto getProto() {
mergeLocalToProto();
proto = viaProto ? proto : builder.build();
viaProto = true;
return proto;
}
private void mergeLocalToBuilder() {
if (this.applicationList != null) {
addLocalApplicationsToProto();
}
}
private void mergeLocalToProto() {
if (viaProto)
maybeInitBuilder();
mergeLocalToBuilder();
proto = builder.build();
viaProto = true;
}
private void maybeInitBuilder() {
if (viaProto || builder == null) {
builder = GetAllApplicationsResponseProto.newBuilder(proto);
}
viaProto = false;
}
//Once this is called. containerList will never be null - untill a getProto is called.
private void initLocalApplicationsList() {
if (this.applicationList != null) {
return;
}
GetAllApplicationsResponseProtoOrBuilder p = viaProto ? proto : builder;
List<ApplicationReportProto> list = p.getApplicationsList();
applicationList = new ArrayList<ApplicationReport>();
for (ApplicationReportProto a : list) {
applicationList.add(convertFromProtoFormat(a));
}
}
private void addLocalApplicationsToProto() {
maybeInitBuilder();
builder.clearApplications();
if (applicationList == null)
return;
Iterable<ApplicationReportProto> iterable = new Iterable<ApplicationReportProto>() {
@Override
public Iterator<ApplicationReportProto> iterator() {
return new Iterator<ApplicationReportProto>() {
Iterator<ApplicationReport> iter = applicationList.iterator();
@Override
public boolean hasNext() {
return iter.hasNext();
}
@Override
public ApplicationReportProto next() {
return convertToProtoFormat(iter.next());
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
};
}
};
builder.addAllApplications(iterable);
}
private ApplicationReportPBImpl convertFromProtoFormat(ApplicationReportProto p) {
return new ApplicationReportPBImpl(p);
}
private ApplicationReportProto convertToProtoFormat(ApplicationReport t) {
return ((ApplicationReportPBImpl)t).getProto();
}
}