solr/core/src/java/org/apache/solr/handler/admin/SystemInfoHandler.java - lucene-solr - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.
  * The ASF licenses this file to You 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.
  */
 package org.apache.solr.handler.admin;

 import java.io.File;
 import java.io.IOException;
 import java.lang.invoke.MethodHandles;
 import java.lang.management.ManagementFactory;
 import java.lang.management.OperatingSystemMXBean;
 import java.lang.management.RuntimeMXBean;
 import java.net.InetAddress;
 import java.text.DecimalFormat;
 import java.text.DecimalFormatSymbols;
 import java.util.Date;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Locale;
 import java.util.Set;

 import com.codahale.metrics.Gauge;
 import org.apache.lucene.LucenePackage;
 import org.apache.solr.common.cloud.UrlScheme;
 import org.apache.solr.common.util.SimpleOrderedMap;
 import org.apache.solr.core.CoreContainer;
 import org.apache.solr.core.SolrCore;
 import org.apache.solr.handler.RequestHandlerBase;
 import org.apache.solr.request.SolrQueryRequest;
 import org.apache.solr.response.SolrQueryResponse;
 import org.apache.solr.schema.IndexSchema;
 import org.apache.solr.security.AuthorizationPlugin;
 import org.apache.solr.security.RuleBasedAuthorizationPluginBase;
 import org.apache.solr.util.RTimer;
 import org.apache.solr.util.RedactionUtils;
 import org.apache.solr.util.stats.MetricUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

 import static org.apache.solr.common.params.CommonParams.NAME;


 /**
  * This handler returns system info
  *
  * @since solr 1.2
  */
 public class SystemInfoHandler extends RequestHandlerBase
 {
   private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
   private static final String PARAM_NODE = "node";

   public static String REDACT_STRING = RedactionUtils.getRedactString();

   /**
    * <p>
    * Undocumented expert level system property to prevent doing a reverse lookup of our hostname.
    * This property will be logged as a suggested workaround if any problems are noticed when doing reverse
    * lookup.
    * </p>
    *
    * <p>
    * TODO: should we refactor this (and the associated logic) into a helper method for any other places
    * where DNS is used?
    * </p>
    * @see #initHostname
    */
   private static final String PREVENT_REVERSE_DNS_OF_LOCALHOST_SYSPROP = "solr.dns.prevent.reverse.lookup";

   // on some platforms, resolving canonical hostname can cause the thread
   // to block for several seconds if nameservices aren't available
   // so resolve this once per handler instance
   //(ie: not static, so core reload will refresh)
   private String hostname = null;

   private CoreContainer cc;

   public SystemInfoHandler() {
     this(null);
   }

   public SystemInfoHandler(CoreContainer cc) {
     super();
     this.cc = cc;
     initHostname();
   }

   private void initHostname() {
     if (null != System.getProperty(PREVENT_REVERSE_DNS_OF_LOCALHOST_SYSPROP, null)) {
       log.info("Resolving canonical hostname for local host prevented due to '{}' sysprop",
                PREVENT_REVERSE_DNS_OF_LOCALHOST_SYSPROP);
       hostname = null;
       return;
     }

     RTimer timer = new RTimer();
     try {
       InetAddress addr = InetAddress.getLocalHost();
       hostname = addr.getCanonicalHostName();
     } catch (Exception e) {
       log.warn("Unable to resolve canonical hostname for local host, possible DNS misconfiguration. SET THE '{}' {}"
           , PREVENT_REVERSE_DNS_OF_LOCALHOST_SYSPROP
           , " sysprop to true on startup to prevent future lookups if DNS can not be fixed.", e);
       hostname = null;
       return;
     }
     timer.stop();

     if (15000D < timer.getTime()) {
       String readableTime = String.format(Locale.ROOT, "%.3f", (timer.getTime() / 1000));
       log.warn("Resolving canonical hostname for local host took {} seconds, possible DNS misconfiguration. Set the '{}' {}"
           , readableTime, PREVENT_REVERSE_DNS_OF_LOCALHOST_SYSPROP,
           " sysprop to true on startup to prevent future lookups if DNS can not be fixed.");
     }
   }

   @Override
   public void handleRequestBody(SolrQueryRequest req, SolrQueryResponse rsp) throws Exception
   {
     rsp.setHttpCaching(false);
     SolrCore core = req.getCore();
     if (AdminHandlersProxy.maybeProxyToNodes(req, rsp, getCoreContainer(req, core))) {
       return; // Request was proxied to other node
     }
     if (core != null) rsp.add( "core", getCoreInfo( core, req.getSchema() ) );
     boolean solrCloudMode =  getCoreContainer(req, core).isZooKeeperAware();
     rsp.add( "mode", solrCloudMode ? "solrcloud" : "std");
     if (solrCloudMode) {
       rsp.add("zkHost", getCoreContainer(req, core).getZkController().getZkServerAddress());
     }
     if (cc != null)
       rsp.add( "solr_home", cc.getSolrHome());
     rsp.add( "lucene", getLuceneInfo() );
     rsp.add( "jvm", getJvmInfo() );
     rsp.add( "security", getSecurityInfo(req) );
     rsp.add( "system", getSystemInfo() );
     if (solrCloudMode) {
       rsp.add("node", getCoreContainer(req, core).getZkController().getNodeName());
     }
     SolrEnvironment env = SolrEnvironment.getFromSyspropOrClusterprop(solrCloudMode ?
         getCoreContainer(req, core).getZkController().zkStateReader : null);
     if (env.isDefined()) {
       rsp.add("environment", env.getCode());
       if (env.getLabel() != null) {
         rsp.add("environment_label", env.getLabel());
       }
       if (env.getColor() != null) {
         rsp.add("environment_color", env.getColor());
       }
     }
   }

   private CoreContainer getCoreContainer(SolrQueryRequest req, SolrCore core) {
     CoreContainer coreContainer;
     if (core != null) {
        coreContainer = req.getCore().getCoreContainer();
     } else {
       coreContainer = cc;
     }
     return coreContainer;
   }

   /**
    * Get system info
    */
   private SimpleOrderedMap<Object> getCoreInfo( SolrCore core, IndexSchema schema ) {
     SimpleOrderedMap<Object> info = new SimpleOrderedMap<>();

     info.add( "schema", schema != null ? schema.getSchemaName():"no schema!" );

     // Host
     info.add( "host", hostname );

     // Now
     info.add( "now", new Date() );

     // Start Time
     info.add( "start", core.getStartTimeStamp() );

     // Solr Home
     SimpleOrderedMap<Object> dirs = new SimpleOrderedMap<>();
     dirs.add( "cwd" , new File( System.getProperty("user.dir")).getAbsolutePath() );
     dirs.add("instance", core.getInstancePath().toString());
     try {
       dirs.add( "data", core.getDirectoryFactory().normalize(core.getDataDir()));
     } catch (IOException e) {
       log.warn("Problem getting the normalized data directory path", e);
       dirs.add( "data", "N/A" );
     }
     dirs.add( "dirimpl", core.getDirectoryFactory().getClass().getName());
     try {
       dirs.add( "index", core.getDirectoryFactory().normalize(core.getIndexDir()) );
     } catch (IOException e) {
       log.warn("Problem getting the normalized index directory path", e);
       dirs.add( "index", "N/A" );
     }
     info.add( "directory", dirs );
     return info;
   }

   /**
    * Get system info
    */
   public static SimpleOrderedMap<Object> getSystemInfo() {
     SimpleOrderedMap<Object> info = new SimpleOrderedMap<>();

     OperatingSystemMXBean os = ManagementFactory.getOperatingSystemMXBean();
     info.add(NAME, os.getName()); // add at least this one
     // add remaining ones dynamically using Java Beans API
     // also those from JVM implementation-specific classes
     MetricUtils.addMXBeanMetrics(os, MetricUtils.OS_MXBEAN_CLASSES, null, (name, metric) -> {
       if (info.get(name) == null) {
         info.add(name, ((Gauge) metric).getValue());
       }
     });

     return info;
   }

   /**
    * Get JVM Info - including memory info
    */
   public static SimpleOrderedMap<Object> getJvmInfo()
   {
     SimpleOrderedMap<Object> jvm = new SimpleOrderedMap<>();

     final String javaVersion = System.getProperty("java.specification.version", "unknown");
     final String javaVendor = System.getProperty("java.specification.vendor", "unknown");
     final String javaName = System.getProperty("java.specification.name", "unknown");
     final String jreVersion = System.getProperty("java.version", "unknown");
     final String jreVendor = System.getProperty("java.vendor", "unknown");
     final String vmVersion = System.getProperty("java.vm.version", "unknown");
     final String vmVendor = System.getProperty("java.vm.vendor", "unknown");
     final String vmName = System.getProperty("java.vm.name", "unknown");

     // Summary Info
     jvm.add( "version", jreVersion + " " + vmVersion);
     jvm.add(NAME, jreVendor + " " + vmName);

     // details
     SimpleOrderedMap<Object> java = new SimpleOrderedMap<>();
     java.add( "vendor", javaVendor );
     java.add(NAME, javaName);
     java.add( "version", javaVersion );
     jvm.add( "spec", java );
     SimpleOrderedMap<Object> jre = new SimpleOrderedMap<>();
     jre.add( "vendor", jreVendor );
     jre.add( "version", jreVersion );
     jvm.add( "jre", jre );
     SimpleOrderedMap<Object> vm = new SimpleOrderedMap<>();
     vm.add( "vendor", vmVendor );
     vm.add(NAME, vmName);
     vm.add( "version", vmVersion );
     jvm.add( "vm", vm );


     Runtime runtime = Runtime.getRuntime();
     jvm.add( "processors", runtime.availableProcessors() );

     // not thread safe, but could be thread local
     DecimalFormat df = new DecimalFormat("#.#", DecimalFormatSymbols.getInstance(Locale.ROOT));

     SimpleOrderedMap<Object> mem = new SimpleOrderedMap<>();
     SimpleOrderedMap<Object> raw = new SimpleOrderedMap<>();
     long free = runtime.freeMemory();
     long max = runtime.maxMemory();
     long total = runtime.totalMemory();
     long used = total - free;
     double percentUsed = ((double)(used)/(double)max)*100;
     raw.add("free",  free );
     mem.add("free",  humanReadableUnits(free, df));
     raw.add("total", total );
     mem.add("total", humanReadableUnits(total, df));
     raw.add("max",   max );
     mem.add("max",   humanReadableUnits(max, df));
     raw.add("used",  used );
     mem.add("used",  humanReadableUnits(used, df) +
             " (%" + df.format(percentUsed) + ")");
     raw.add("used%", percentUsed);

     mem.add("raw", raw);
     jvm.add("memory", mem);

     // JMX properties -- probably should be moved to a different handler
     SimpleOrderedMap<Object> jmx = new SimpleOrderedMap<>();
     try{
       RuntimeMXBean mx = ManagementFactory.getRuntimeMXBean();
       if (mx.isBootClassPathSupported()) {
         jmx.add( "bootclasspath", mx.getBootClassPath());
       }
       jmx.add( "classpath", mx.getClassPath() );

       // the input arguments passed to the Java virtual machine
       // which does not include the arguments to the main method.
       jmx.add( "commandLineArgs", getInputArgumentsRedacted(mx));

       jmx.add( "startTime", new Date(mx.getStartTime()));
       jmx.add( "upTimeMS",  mx.getUptime() );

     }
     catch (Exception e) {
       log.warn("Error getting JMX properties", e);
     }
     jvm.add( "jmx", jmx );
     return jvm;
   }

   /**
    * Get Security Info
    */
   public SimpleOrderedMap<Object> getSecurityInfo(SolrQueryRequest req)
   {
     SimpleOrderedMap<Object> info = new SimpleOrderedMap<>();

     if (cc != null) {
       if (cc.getAuthenticationPlugin() != null) {
         info.add("authenticationPlugin", cc.getAuthenticationPlugin().getName());
       }
       if (cc.getAuthorizationPlugin() != null) {
         info.add("authorizationPlugin", cc.getAuthorizationPlugin().getClass().getName());
       }
     }

     // User principal
     String username = null;
     if (req.getUserPrincipal() != null) {
       username = req.getUserPrincipal().getName();
       info.add("username", username);

       // Mapped roles for this principal
       @SuppressWarnings("resource")
       AuthorizationPlugin auth = cc==null? null: cc.getAuthorizationPlugin();
       if (auth instanceof RuleBasedAuthorizationPluginBase) {
         RuleBasedAuthorizationPluginBase rbap = (RuleBasedAuthorizationPluginBase) auth;
         Set<String> roles = rbap.getUserRoles(req.getUserPrincipal());
         info.add("roles", roles);
       }
     }

     info.add("tls", UrlScheme.HTTPS.equals(UrlScheme.INSTANCE.getUrlScheme()));

     return info;
   }


   private static SimpleOrderedMap<Object> getLuceneInfo() {
     SimpleOrderedMap<Object> info = new SimpleOrderedMap<>();

     Package p = SolrCore.class.getPackage();

     info.add( "solr-spec-version", p.getSpecificationVersion() );
     info.add( "solr-impl-version", p.getImplementationVersion() );

     p = LucenePackage.class.getPackage();

     info.add( "lucene-spec-version", p.getSpecificationVersion() );
     info.add( "lucene-impl-version", p.getImplementationVersion() );

     return info;
   }

   //////////////////////// SolrInfoMBeans methods //////////////////////

   @Override
   public String getDescription() {
     return "Get System Info";
   }

   @Override
   public Category getCategory() {
     return Category.ADMIN;
   }

   private static final long ONE_KB = 1024;
   private static final long ONE_MB = ONE_KB * ONE_KB;
   private static final long ONE_GB = ONE_KB * ONE_MB;

   /**
    * Return good default units based on byte size.
    */
   private static String humanReadableUnits(long bytes, DecimalFormat df) {
     String newSizeAndUnits;

     if (bytes / ONE_GB > 0) {
       newSizeAndUnits = String.valueOf(df.format((float)bytes / ONE_GB)) + " GB";
     } else if (bytes / ONE_MB > 0) {
       newSizeAndUnits = String.valueOf(df.format((float)bytes / ONE_MB)) + " MB";
     } else if (bytes / ONE_KB > 0) {
       newSizeAndUnits = String.valueOf(df.format((float)bytes / ONE_KB)) + " KB";
     } else {
       newSizeAndUnits = String.valueOf(bytes) + " bytes";
     }

     return newSizeAndUnits;
   }

   private static List<String> getInputArgumentsRedacted(RuntimeMXBean mx) {
     List<String> list = new LinkedList<>();
     for (String arg : mx.getInputArguments()) {
       if (arg.startsWith("-D") && arg.contains("=") && RedactionUtils.isSystemPropertySensitive(arg.substring(2, arg.indexOf("=")))) {
         list.add(String.format(Locale.ROOT, "%s=%s", arg.substring(0, arg.indexOf("=")), REDACT_STRING));
       } else {
         list.add(arg);
       }
     }
     return list;
   }

 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one or more
	* contributor license agreements. See the NOTICE file distributed with
	* this work for additional information regarding copyright ownership.
	* The ASF licenses this file to You 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.
	*/
	package org.apache.solr.handler.admin;

	import java.io.File;
	import java.io.IOException;
	import java.lang.invoke.MethodHandles;
	import java.lang.management.ManagementFactory;
	import java.lang.management.OperatingSystemMXBean;
	import java.lang.management.RuntimeMXBean;
	import java.net.InetAddress;
	import java.text.DecimalFormat;
	import java.text.DecimalFormatSymbols;
	import java.util.Date;
	import java.util.LinkedList;
	import java.util.List;
	import java.util.Locale;
	import java.util.Set;

	import com.codahale.metrics.Gauge;
	import org.apache.lucene.LucenePackage;
	import org.apache.solr.common.cloud.UrlScheme;
	import org.apache.solr.common.util.SimpleOrderedMap;
	import org.apache.solr.core.CoreContainer;
	import org.apache.solr.core.SolrCore;
	import org.apache.solr.handler.RequestHandlerBase;
	import org.apache.solr.request.SolrQueryRequest;
	import org.apache.solr.response.SolrQueryResponse;
	import org.apache.solr.schema.IndexSchema;
	import org.apache.solr.security.AuthorizationPlugin;
	import org.apache.solr.security.RuleBasedAuthorizationPluginBase;
	import org.apache.solr.util.RTimer;
	import org.apache.solr.util.RedactionUtils;
	import org.apache.solr.util.stats.MetricUtils;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;

	import static org.apache.solr.common.params.CommonParams.NAME;


	/**
	* This handler returns system info
	*
	* @since solr 1.2
	*/
	public class SystemInfoHandler extends RequestHandlerBase
	{
	private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
	private static final String PARAM_NODE = "node";

	public static String REDACT_STRING = RedactionUtils.getRedactString();

	/**
	* <p>
	* Undocumented expert level system property to prevent doing a reverse lookup of our hostname.
	* This property will be logged as a suggested workaround if any problems are noticed when doing reverse
	* lookup.
	* </p>
	*
	* <p>
	* TODO: should we refactor this (and the associated logic) into a helper method for any other places
	* where DNS is used?
	* </p>
	* @see #initHostname
	*/
	private static final String PREVENT_REVERSE_DNS_OF_LOCALHOST_SYSPROP = "solr.dns.prevent.reverse.lookup";

	// on some platforms, resolving canonical hostname can cause the thread
	// to block for several seconds if nameservices aren't available
	// so resolve this once per handler instance
	//(ie: not static, so core reload will refresh)
	private String hostname = null;

	private CoreContainer cc;

	public SystemInfoHandler() {
	this(null);
	}

	public SystemInfoHandler(CoreContainer cc) {
	super();
	this.cc = cc;
	initHostname();
	}

	private void initHostname() {
	if (null != System.getProperty(PREVENT_REVERSE_DNS_OF_LOCALHOST_SYSPROP, null)) {
	log.info("Resolving canonical hostname for local host prevented due to '{}' sysprop",
	PREVENT_REVERSE_DNS_OF_LOCALHOST_SYSPROP);
	hostname = null;
	return;
	}

	RTimer timer = new RTimer();
	try {
	InetAddress addr = InetAddress.getLocalHost();
	hostname = addr.getCanonicalHostName();
	} catch (Exception e) {
	log.warn("Unable to resolve canonical hostname for local host, possible DNS misconfiguration. SET THE '{}' {}"
	, PREVENT_REVERSE_DNS_OF_LOCALHOST_SYSPROP
	, " sysprop to true on startup to prevent future lookups if DNS can not be fixed.", e);
	hostname = null;
	return;
	}
	timer.stop();

	if (15000D < timer.getTime()) {
	String readableTime = String.format(Locale.ROOT, "%.3f", (timer.getTime() / 1000));
	log.warn("Resolving canonical hostname for local host took {} seconds, possible DNS misconfiguration. Set the '{}' {}"
	, readableTime, PREVENT_REVERSE_DNS_OF_LOCALHOST_SYSPROP,
	" sysprop to true on startup to prevent future lookups if DNS can not be fixed.");
	}
	}

	@Override
	public void handleRequestBody(SolrQueryRequest req, SolrQueryResponse rsp) throws Exception
	{
	rsp.setHttpCaching(false);
	SolrCore core = req.getCore();
	if (AdminHandlersProxy.maybeProxyToNodes(req, rsp, getCoreContainer(req, core))) {
	return; // Request was proxied to other node
	}
	if (core != null) rsp.add( "core", getCoreInfo( core, req.getSchema() ) );
	boolean solrCloudMode = getCoreContainer(req, core).isZooKeeperAware();
	rsp.add( "mode", solrCloudMode ? "solrcloud" : "std");
	if (solrCloudMode) {
	rsp.add("zkHost", getCoreContainer(req, core).getZkController().getZkServerAddress());
	}
	if (cc != null)
	rsp.add( "solr_home", cc.getSolrHome());
	rsp.add( "lucene", getLuceneInfo() );
	rsp.add( "jvm", getJvmInfo() );
	rsp.add( "security", getSecurityInfo(req) );
	rsp.add( "system", getSystemInfo() );
	if (solrCloudMode) {
	rsp.add("node", getCoreContainer(req, core).getZkController().getNodeName());
	}
	SolrEnvironment env = SolrEnvironment.getFromSyspropOrClusterprop(solrCloudMode ?
	getCoreContainer(req, core).getZkController().zkStateReader : null);
	if (env.isDefined()) {
	rsp.add("environment", env.getCode());
	if (env.getLabel() != null) {
	rsp.add("environment_label", env.getLabel());
	}
	if (env.getColor() != null) {
	rsp.add("environment_color", env.getColor());
	}
	}
	}

	private CoreContainer getCoreContainer(SolrQueryRequest req, SolrCore core) {
	CoreContainer coreContainer;
	if (core != null) {
	coreContainer = req.getCore().getCoreContainer();
	} else {
	coreContainer = cc;
	}
	return coreContainer;
	}

	/**
	* Get system info
	*/
	private SimpleOrderedMap<Object> getCoreInfo( SolrCore core, IndexSchema schema ) {
	SimpleOrderedMap<Object> info = new SimpleOrderedMap<>();

	info.add( "schema", schema != null ? schema.getSchemaName():"no schema!" );

	// Host
	info.add( "host", hostname );

	// Now
	info.add( "now", new Date() );

	// Start Time
	info.add( "start", core.getStartTimeStamp() );

	// Solr Home
	SimpleOrderedMap<Object> dirs = new SimpleOrderedMap<>();
	dirs.add( "cwd" , new File( System.getProperty("user.dir")).getAbsolutePath() );
	dirs.add("instance", core.getInstancePath().toString());
	try {
	dirs.add( "data", core.getDirectoryFactory().normalize(core.getDataDir()));
	} catch (IOException e) {
	log.warn("Problem getting the normalized data directory path", e);
	dirs.add( "data", "N/A" );
	}
	dirs.add( "dirimpl", core.getDirectoryFactory().getClass().getName());
	try {
	dirs.add( "index", core.getDirectoryFactory().normalize(core.getIndexDir()) );
	} catch (IOException e) {
	log.warn("Problem getting the normalized index directory path", e);
	dirs.add( "index", "N/A" );
	}
	info.add( "directory", dirs );
	return info;
	}

	/**
	* Get system info
	*/
	public static SimpleOrderedMap<Object> getSystemInfo() {
	SimpleOrderedMap<Object> info = new SimpleOrderedMap<>();

	OperatingSystemMXBean os = ManagementFactory.getOperatingSystemMXBean();
	info.add(NAME, os.getName()); // add at least this one
	// add remaining ones dynamically using Java Beans API
	// also those from JVM implementation-specific classes
	MetricUtils.addMXBeanMetrics(os, MetricUtils.OS_MXBEAN_CLASSES, null, (name, metric) -> {
	if (info.get(name) == null) {
	info.add(name, ((Gauge) metric).getValue());
	}
	});

	return info;
	}

	/**
	* Get JVM Info - including memory info
	*/
	public static SimpleOrderedMap<Object> getJvmInfo()
	{
	SimpleOrderedMap<Object> jvm = new SimpleOrderedMap<>();

	final String javaVersion = System.getProperty("java.specification.version", "unknown");
	final String javaVendor = System.getProperty("java.specification.vendor", "unknown");
	final String javaName = System.getProperty("java.specification.name", "unknown");
	final String jreVersion = System.getProperty("java.version", "unknown");
	final String jreVendor = System.getProperty("java.vendor", "unknown");
	final String vmVersion = System.getProperty("java.vm.version", "unknown");
	final String vmVendor = System.getProperty("java.vm.vendor", "unknown");
	final String vmName = System.getProperty("java.vm.name", "unknown");

	// Summary Info
	jvm.add( "version", jreVersion + " " + vmVersion);
	jvm.add(NAME, jreVendor + " " + vmName);

	// details
	SimpleOrderedMap<Object> java = new SimpleOrderedMap<>();
	java.add( "vendor", javaVendor );
	java.add(NAME, javaName);
	java.add( "version", javaVersion );
	jvm.add( "spec", java );
	SimpleOrderedMap<Object> jre = new SimpleOrderedMap<>();
	jre.add( "vendor", jreVendor );
	jre.add( "version", jreVersion );
	jvm.add( "jre", jre );
	SimpleOrderedMap<Object> vm = new SimpleOrderedMap<>();
	vm.add( "vendor", vmVendor );
	vm.add(NAME, vmName);
	vm.add( "version", vmVersion );
	jvm.add( "vm", vm );


	Runtime runtime = Runtime.getRuntime();
	jvm.add( "processors", runtime.availableProcessors() );

	// not thread safe, but could be thread local
	DecimalFormat df = new DecimalFormat("#.#", DecimalFormatSymbols.getInstance(Locale.ROOT));

	SimpleOrderedMap<Object> mem = new SimpleOrderedMap<>();
	SimpleOrderedMap<Object> raw = new SimpleOrderedMap<>();
	long free = runtime.freeMemory();
	long max = runtime.maxMemory();
	long total = runtime.totalMemory();
	long used = total - free;
	double percentUsed = ((double)(used)/(double)max)*100;
	raw.add("free", free );
	mem.add("free", humanReadableUnits(free, df));
	raw.add("total", total );
	mem.add("total", humanReadableUnits(total, df));
	raw.add("max", max );
	mem.add("max", humanReadableUnits(max, df));
	raw.add("used", used );
	mem.add("used", humanReadableUnits(used, df) +
	" (%" + df.format(percentUsed) + ")");
	raw.add("used%", percentUsed);

	mem.add("raw", raw);
	jvm.add("memory", mem);

	// JMX properties -- probably should be moved to a different handler
	SimpleOrderedMap<Object> jmx = new SimpleOrderedMap<>();
	try{
	RuntimeMXBean mx = ManagementFactory.getRuntimeMXBean();
	if (mx.isBootClassPathSupported()) {
	jmx.add( "bootclasspath", mx.getBootClassPath());
	}
	jmx.add( "classpath", mx.getClassPath() );

	// the input arguments passed to the Java virtual machine
	// which does not include the arguments to the main method.
	jmx.add( "commandLineArgs", getInputArgumentsRedacted(mx));

	jmx.add( "startTime", new Date(mx.getStartTime()));
	jmx.add( "upTimeMS", mx.getUptime() );

	}
	catch (Exception e) {
	log.warn("Error getting JMX properties", e);
	}
	jvm.add( "jmx", jmx );
	return jvm;
	}

	/**
	* Get Security Info
	*/
	public SimpleOrderedMap<Object> getSecurityInfo(SolrQueryRequest req)
	{
	SimpleOrderedMap<Object> info = new SimpleOrderedMap<>();

	if (cc != null) {
	if (cc.getAuthenticationPlugin() != null) {
	info.add("authenticationPlugin", cc.getAuthenticationPlugin().getName());
	}
	if (cc.getAuthorizationPlugin() != null) {
	info.add("authorizationPlugin", cc.getAuthorizationPlugin().getClass().getName());
	}
	}

	// User principal
	String username = null;
	if (req.getUserPrincipal() != null) {
	username = req.getUserPrincipal().getName();
	info.add("username", username);

	// Mapped roles for this principal
	@SuppressWarnings("resource")
	AuthorizationPlugin auth = cc==null? null: cc.getAuthorizationPlugin();
	if (auth instanceof RuleBasedAuthorizationPluginBase) {
	RuleBasedAuthorizationPluginBase rbap = (RuleBasedAuthorizationPluginBase) auth;
	Set<String> roles = rbap.getUserRoles(req.getUserPrincipal());
	info.add("roles", roles);
	}
	}

	info.add("tls", UrlScheme.HTTPS.equals(UrlScheme.INSTANCE.getUrlScheme()));

	return info;
	}


	private static SimpleOrderedMap<Object> getLuceneInfo() {
	SimpleOrderedMap<Object> info = new SimpleOrderedMap<>();

	Package p = SolrCore.class.getPackage();

	info.add( "solr-spec-version", p.getSpecificationVersion() );
	info.add( "solr-impl-version", p.getImplementationVersion() );

	p = LucenePackage.class.getPackage();

	info.add( "lucene-spec-version", p.getSpecificationVersion() );
	info.add( "lucene-impl-version", p.getImplementationVersion() );

	return info;
	}

	//////////////////////// SolrInfoMBeans methods //////////////////////

	@Override
	public String getDescription() {
	return "Get System Info";
	}

	@Override
	public Category getCategory() {
	return Category.ADMIN;
	}

	private static final long ONE_KB = 1024;
	private static final long ONE_MB = ONE_KB * ONE_KB;
	private static final long ONE_GB = ONE_KB * ONE_MB;

	/**
	* Return good default units based on byte size.
	*/
	private static String humanReadableUnits(long bytes, DecimalFormat df) {
	String newSizeAndUnits;

	if (bytes / ONE_GB > 0) {
	newSizeAndUnits = String.valueOf(df.format((float)bytes / ONE_GB)) + " GB";
	} else if (bytes / ONE_MB > 0) {
	newSizeAndUnits = String.valueOf(df.format((float)bytes / ONE_MB)) + " MB";
	} else if (bytes / ONE_KB > 0) {
	newSizeAndUnits = String.valueOf(df.format((float)bytes / ONE_KB)) + " KB";
	} else {
	newSizeAndUnits = String.valueOf(bytes) + " bytes";
	}

	return newSizeAndUnits;
	}

	private static List<String> getInputArgumentsRedacted(RuntimeMXBean mx) {
	List<String> list = new LinkedList<>();
	for (String arg : mx.getInputArguments()) {
	if (arg.startsWith("-D") && arg.contains("=") && RedactionUtils.isSystemPropertySensitive(arg.substring(2, arg.indexOf("=")))) {
	list.add(String.format(Locale.ROOT, "%s=%s", arg.substring(0, arg.indexOf("=")), REDACT_STRING));
	} else {
	list.add(arg);
	}
	}
	return list;
	}

	}