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/*
* ============LICENSE_START====================================================
* org.onap.music.mdbc
* =============================================================================
* Copyright (C) 2018 AT&T Intellectual Property. All rights reserved.
* =============================================================================
* 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.
* ============LICENSE_END======================================================
*/
package org.onap.music.mdbc;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.util.*;
import org.onap.music.logging.EELFLoggerDelegate;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
/**
* A database range contain information about what ranges should be hosted in the current MDBC instance
* A database range with an empty map, is supposed to contain all the tables in Music.
* @author Enrique Saurez
*/
public class DatabasePartition {
private transient static EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(DatabasePartition.class);
private UUID musicRangeInformationIndex;//Index that can be obtained either from
private String lockId;
protected Set<Range> ranges;
private boolean ready;
/**
* Each range represents a partition of the database, a database partition is a union of this partitions.
* The only requirement is that the ranges are not overlapping.
*/
public DatabasePartition(UUID mriIndex) {
this(new HashSet<Range>(), mriIndex);
}
/**
* Create unlocked partition
* @param ranges
* @param mriIndex
*/
public DatabasePartition(Set<Range> ranges, UUID mriIndex) {
this(ranges, mriIndex, null);
}
public DatabasePartition(Set<Range> knownRanges, UUID mriIndex, String lockId) {
if(mriIndex==null){
ready = false;
}
else{
ready = true;
}
ranges = knownRanges;
this.setMusicRangeInformationIndex(mriIndex);
this.setLockId(lockId);
}
/**
* This function is used to change the contents of this, with the contents of a different object
* @param otherPartition partition that is used to substitute the local contents
*/
public synchronized void updateDatabasePartition(DatabasePartition otherPartition){
musicRangeInformationIndex = otherPartition.musicRangeInformationIndex;//Index that can be obtained either from
lockId = otherPartition.lockId;
ranges = otherPartition.ranges;
ready = otherPartition.ready;
}
public String toString(){
StringBuilder builder = new StringBuilder().append("Row: ["+musicRangeInformationIndex.toString()+"], lockId: ["+lockId +"], ranges: [");
for(Range r: ranges){
builder.append(r.toString()).append(",");
}
builder.append("]");
return builder.toString();
}
public synchronized boolean isLocked(){
return lockId != null && !lockId.isEmpty();
}
public synchronized boolean isReady() {
return ready;
}
public synchronized void setReady(boolean ready) {
this.ready = ready;
}
public synchronized UUID getMRIIndex() {
return musicRangeInformationIndex;
}
public synchronized void setMusicRangeInformationIndex(UUID musicRangeInformationIndex) {
this.musicRangeInformationIndex = musicRangeInformationIndex;
}
/**
* Add a new range to the ones own by the local MDBC
* @param newRange range that is being added
* @throws IllegalArgumentException
*/
public synchronized void addNewRange(Range newRange) {
//Check overlap
for(Range r : ranges) {
if(r.overlaps(newRange)) {
throw new IllegalArgumentException("Range is already contain by a previous range");
}
}
ranges.add(newRange);
}
/**
* Delete a range that is being modified
* @param rangeToDel limits of the range
*/
public synchronized void deleteRange(Range rangeToDel) {
if(!ranges.contains(rangeToDel)) {
logger.error(EELFLoggerDelegate.errorLogger,"Range doesn't exist");
throw new IllegalArgumentException("Invalid table");
}
ranges.remove(rangeToDel);
}
/**
* Get all the ranges that are currently owned
* @return ranges
*/
public synchronized Set<Range> getSnapshot() {
Set<Range> newRange = new HashSet<>();
for (Range r: ranges){
newRange.add(r.clone());
}
return newRange;
}
/**
* Serialize the ranges
* @return serialized ranges
*/
public String toJson() {
GsonBuilder builder = new GsonBuilder();
builder.setPrettyPrinting().serializeNulls();;
Gson gson = builder.create();
return gson.toJson(this);
}
/**
* Function to obtain the configuration
* @param filepath path to the database range
* @return a new object of type DatabaseRange
* @throws FileNotFoundException
*/
public static DatabasePartition readJsonFromFile( String filepath) throws FileNotFoundException {
BufferedReader br;
try {
br = new BufferedReader(
new FileReader(filepath));
} catch (FileNotFoundException e) {
logger.error(EELFLoggerDelegate.errorLogger,"File was not found when reading json"+e);
throw e;
}
Gson gson = new Gson();
DatabasePartition range = gson.fromJson(br, DatabasePartition.class);
return range;
}
public synchronized String getLockId() {
return lockId;
}
public synchronized void setLockId(String lockId) {
this.lockId = lockId;
}
public synchronized boolean isContained(Range range){
for(Range r: ranges){
if(r.overlaps(range)){
return true;
}
}
return false;
}
/**
* Checks if the database partition contains all of the ranges
* @param ranges
* @return
*/
public synchronized boolean contains(List<Range> ranges) {
for (Range range: ranges) {
if (!isContained(range)) {
return false;
}
}
return true;
}
}
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