6ed255f2e3
This cache the get data center and get rack results for 10s, it has a direct impact on nodetool status and nodetool ring Signed-off-by: Amnon Heiman <amnon@cloudius-systems.com>
105 lines
3.4 KiB
Java
105 lines
3.4 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.cassandra.locator;
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import java.lang.management.ManagementFactory;
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import java.net.InetAddress;
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import java.net.UnknownHostException;
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import javax.management.MBeanServer;
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import javax.management.ObjectName;
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import javax.ws.rs.core.MultivaluedMap;
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import com.cloudius.urchin.api.APIClient;
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import com.sun.jersey.core.util.MultivaluedMapImpl;
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public class EndpointSnitchInfo implements EndpointSnitchInfoMBean {
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private static final java.util.logging.Logger logger = java.util.logging.Logger
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.getLogger(EndpointSnitchInfo.class.getName());
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private APIClient c = new APIClient();
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public void log(String str) {
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logger.info(str);
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}
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private static final EndpointSnitchInfo instance = new EndpointSnitchInfo();
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public static EndpointSnitchInfo getInstance() {
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return instance;
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}
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private EndpointSnitchInfo() {
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MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
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try {
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mbs.registerMBean(this, new ObjectName(
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"org.apache.cassandra.db:type=EndpointSnitchInfo"));
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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/**
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* Provides the Rack name depending on the respective snitch used, given the
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* host name/ip
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*
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* @param host
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* @throws UnknownHostException
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*/
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@Override
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public String getRack(String host) throws UnknownHostException {
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log("getRack(String host) throws UnknownHostException");
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MultivaluedMap<String, String> queryParams = new MultivaluedMapImpl();
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if (host == null) {
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host = InetAddress.getLoopbackAddress().getHostAddress();
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}
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queryParams.add("host", host);
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return c.getStringValue("/snitch/rack", queryParams, 10000);
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}
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/**
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* Provides the Datacenter name depending on the respective snitch used,
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* given the hostname/ip
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*
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* @param host
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* @throws UnknownHostException
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*/
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@Override
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public String getDatacenter(String host) throws UnknownHostException {
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log(" getDatacenter(String host) throws UnknownHostException");
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MultivaluedMap<String, String> queryParams = new MultivaluedMapImpl();
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if (host == null) {
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host = InetAddress.getLoopbackAddress().getHostAddress();
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}
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queryParams.add("host", host);
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return c.getStringValue("/snitch/datacenter", queryParams, 10000);
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}
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/**
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* Provides the snitch name of the cluster
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*
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* @return Snitch name
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*/
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@Override
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public String getSnitchName() {
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log(" getSnitchName()");
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return c.getStringValue("/snitch/name");
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}
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}
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