112 lines
3.8 KiB
Java
112 lines
3.8 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.gossip.manager;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.util.concurrent.ConcurrentHashMap;
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import org.apache.gossip.model.GossipDataMessage;
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import org.apache.gossip.model.SharedGossipDataMessage;
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import org.apache.log4j.Logger;
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import com.fasterxml.jackson.databind.ObjectMapper;
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public class UserDataPersister implements Runnable {
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private static final Logger LOGGER = Logger.getLogger(UserDataPersister.class);
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private static final ObjectMapper MAPPER = new ObjectMapper();
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private final GossipManager parent;
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private final GossipCore gossipCore;
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UserDataPersister(GossipManager parent, GossipCore gossipCore){
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this.parent = parent;
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this.gossipCore = gossipCore;
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MAPPER.enableDefaultTyping();
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}
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File computeSharedTarget(){
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return new File(parent.getSettings().getPathToDataState(), "shareddata."
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+ parent.getMyself().getClusterName() + "." + parent.getMyself().getId() + ".json");
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}
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File computePerNodeTarget() {
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return new File(parent.getSettings().getPathToDataState(), "pernodedata."
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+ parent.getMyself().getClusterName() + "." + parent.getMyself().getId() + ".json");
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}
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@SuppressWarnings("unchecked")
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ConcurrentHashMap<String, ConcurrentHashMap<String, GossipDataMessage>> readPerNodeFromDisk(){
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if (!parent.getSettings().isPersistDataState()){
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return new ConcurrentHashMap<String, ConcurrentHashMap<String, GossipDataMessage>>();
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}
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try (FileInputStream fos = new FileInputStream(computePerNodeTarget())){
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return MAPPER.readValue(fos, ConcurrentHashMap.class);
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} catch (IOException e) {
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LOGGER.debug(e);
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}
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return new ConcurrentHashMap<String, ConcurrentHashMap<String, GossipDataMessage>>();
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}
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void writePerNodeToDisk(){
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if (!parent.getSettings().isPersistDataState()){
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return;
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}
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try (FileOutputStream fos = new FileOutputStream(computePerNodeTarget())){
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MAPPER.writeValue(fos, gossipCore.getPerNodeData());
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} catch (IOException e) {
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LOGGER.warn(e);
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}
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}
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void writeSharedToDisk(){
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if (!parent.getSettings().isPersistDataState()){
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return;
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}
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try (FileOutputStream fos = new FileOutputStream(computeSharedTarget())){
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MAPPER.writeValue(fos, gossipCore.getSharedData());
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} catch (IOException e) {
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LOGGER.warn(e);
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}
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}
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@SuppressWarnings("unchecked")
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ConcurrentHashMap<String, SharedGossipDataMessage> readSharedDataFromDisk(){
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if (!parent.getSettings().isPersistRingState()){
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return new ConcurrentHashMap<String, SharedGossipDataMessage>();
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}
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try (FileInputStream fos = new FileInputStream(computeSharedTarget())){
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return MAPPER.readValue(fos, ConcurrentHashMap.class);
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} catch (IOException e) {
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LOGGER.debug(e);
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}
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return new ConcurrentHashMap<String, SharedGossipDataMessage>();
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}
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/**
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* Writes all pernode and shared data to disk
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*/
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@Override
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public void run() {
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writePerNodeToDisk();
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writeSharedToDisk();
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}
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}
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