649922fed8
The API returns errors with an HTTP code 400, 404 or 500 depending on the cause with a json object that contains the failure reason. The error message should be populate to the JMX calling client, translated to the appropriate exception. This patch adds the ability to detect API failure and throw a runtime exception with the returned message. It is up to the calling method what to do with the exception, if it would do nothing, the calling client would get a RuntimeException, depends on origin MBean definition, the caller can catch the exception and throw a specific kind. Note that any exception that is thrown must be known to the JMX client or it will not be able to process it. As a first step, this patch replaces the jersey client to the newer version under glassfish, which has an easy way of getting a Reply object, and check its status before returning the results. The only difference in the method that uses the APIClient is the use of MultivaluedHashMap. The following MBean implementation where changed ColumnFamily CompactionManager Gossiper EndpointSnitchInfo CacheService StorageProxy StorageService Signed-off-by: Amnon Heiman <amnon@scylladb.com>
105 lines
3.5 KiB
Java
105 lines
3.5 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.MultivaluedHashMap;
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import javax.ws.rs.core.MultivaluedMap;
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import com.cloudius.urchin.api.APIClient;
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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 MultivaluedHashMap<String, String>();
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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 MultivaluedHashMap<String, String>();
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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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