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/*
* ============LICENSE_START=======================================================
* ONAP : CCSDK.apps.sdnr.wt.apigateway
* ================================================================================
* Copyright (C) 2019 highstreet technologies GmbH 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.ccsdk.features.sdnr.wt.apigateway.database;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
public class DatabaseEntryProvider implements AutoCloseable {
private final DatabaseHttpClient httpClient;
private int refreshInterval;
private final Map<String, MediatorServerInfo> entries;
private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
private boolean isRunning;
protected DatabaseEntryProvider (DatabaseHttpClient httpClient,int refreshInterval) {
this.httpClient = httpClient;
this.refreshInterval = refreshInterval;
this.entries = new HashMap<String, MediatorServerInfo>();
this.isRunning = false;
this.scheduler.scheduleAtFixedRate(onTick, this.refreshInterval, this.refreshInterval, TimeUnit.SECONDS);
}
public DatabaseEntryProvider(String dbBaseUri, int refreshInterval) {
this.httpClient = new DatabaseHttpClient(dbBaseUri, false);
this.refreshInterval = refreshInterval;
this.entries = new HashMap<String, MediatorServerInfo>();
this.isRunning = false;
this.scheduler.scheduleAtFixedRate(onTick, this.refreshInterval, this.refreshInterval, TimeUnit.SECONDS);
}
private final Runnable onTick = new Runnable() {
@Override
public void run() {
isRunning = true;
Map<String, MediatorServerInfo> map = DatabaseEntryProvider.this.httpClient.requestEntries();
DatabaseEntryProvider.this.entries.putAll(map);
isRunning = false;
}
};
public String getHostUrl(String dbServerId) {
MediatorServerInfo info = this.entries.getOrDefault(dbServerId, null);
return info == null ? null : info.getHost();
}
@Override
public void close() throws Exception {
this.scheduler.shutdown();
}
public boolean triggerReloadSync() {
new Thread(onTick).start();
int i=20;
while(isRunning && i-->0) {
try {
Thread.sleep(500);
} catch (InterruptedException e) {
Thread.interrupted();
}
}
return i>0;
}
public void setEntries(Map<String, MediatorServerInfo> e) {
this.entries.clear();
this.entries.putAll(e);
}
public String printEntries() {
String s="";
if(this.entries==null || this.entries.size()<=0) {
return "empty";
}
for(Entry<String, MediatorServerInfo> entry:this.entries.entrySet()) {
s+=String.format("%s:%s", entry.getKey(),entry.getValue().toString()+"\n");
}
return s;
}
}
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