package com.tangosol.examples.explore;
import com.tangosol.net.CacheFactory;
import com.tangosol.net.Cluster;
import com.tangosol.net.DefaultConfigurableCacheFactory;
import com.tangosol.net.DefaultConfigurableCacheFactory.CacheInfo;
import com.tangosol.net.Member;
import com.tangosol.net.NamedCache;
import com.tangosol.run.xml.XmlElement;
import com.tangosol.util.Base;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.util.Iterator;
/**
* A command line tool utilizing simple cache operations.
*
* @author ag 2003.07.25
* @author jh 2005.06.08
*/
public class SimpleCacheExplorer
{
/**
* Entry point.
*
* @param asArg command line arguments
*/
public static void main(String[] asArg)
throws Exception
{
// Get the cache implementation
NamedCache cache = CacheFactory.getCache("VirtualCache");
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
PrintStream out = System.out;
while (true)
{
out.println();
out.print("Command: ");
out.flush();
String sLine = in.readLine();
if (sLine != null && sLine.trim().length() > 0)
{
out.println();
String[] asPart = Base.parseDelimitedString(sLine.trim(), ' ');
int cParts = asPart.length;
String sCmd = asPart[0];
try
{
if ( sCmd.equalsIgnoreCase("bye")
|| sCmd.equalsIgnoreCase("exit")
|| sCmd.equalsIgnoreCase("q")
|| sCmd.equalsIgnoreCase("quit"))
{
CacheFactory.shutdown();
out.println(">> all cache services are shut down");
break;
}
else if (sCmd.equalsIgnoreCase("clear"))
{
cache.clear();
out.println(">> cleared");
}
else if (sCmd.equalsIgnoreCase("get"))
{
if (cParts < 2)
{
out.println("get <key>");
}
else
{
String sKey = asPart[1];
out.println(">> Value is " + cache.get(sKey));
}
}
else if (sCmd.equalsIgnoreCase("info"))
{
printConfigInfo(cache);
}
else if (sCmd.equalsIgnoreCase("keys"))
{
for (Iterator iter = cache.keySet().iterator(); iter.hasNext(); )
{
out.println(">> " + iter.next());
}
}
else if (sCmd.equalsIgnoreCase("put"))
{
if (cParts < 3)
{
out.println("put <key> <value>");
}
else
{
String sKey = asPart[1];
String sValue = asPart[2];
cache.put(sKey, sValue);
out.println(">> Put Complete");
}
}
else if (sCmd.equalsIgnoreCase("remove"))
{
if (cParts < 2)
{
out.println("remove <key>");
}
else
{
String sKey = asPart[1];
cache.remove(sKey);
out.println(">> Remove Complete");
}
}
else if (sCmd.equalsIgnoreCase("help"))
{
out.println("clear");
out.println("get <key>");
out.println("keys");
out.println("info");
out.println("put <key> <value>");
out.println("quit");
out.println("remove <key>");
}
else
{
out.println("unknown command: " + sCmd);
out.println("try \"help\"");
}
}
catch (Throwable e)
{
// log the exception and continue
out.println(">> Exception during cache operation:");
out.println(e);
}
}
}
}
/**
* Get and print the cache configuration and current cluster membership information.
* <p>
* These features are a little more advanced then the simple cache manipulation,
* and are included here to make the example more usable and complete.
* As you can see - it is rather straightforward, so by all means explore it.
* You have been warned ;-)
*/
public static void printConfigInfo(NamedCache cache)
{
PrintStream out = System.out;
// print the information about the cache configuration
DefaultConfigurableCacheFactory factory =
(DefaultConfigurableCacheFactory) CacheFactory.getConfigurableCacheFactory();
String sCacheName = cache.getCacheName();
CacheInfo cacheInfo = factory.findSchemeMapping(sCacheName);
XmlElement xmlConf = factory.resolveScheme(cacheInfo);
out.println(">> " + sCacheName + " cache is using a cache-scheme named '"
+ cacheInfo.getSchemeName() + "' defined as:");
out.println(xmlConf);
out.println();
// print the information about cluster members
Cluster cluster = CacheFactory.getCluster();
Member memberThis = cluster.getLocalMember();
out.println(">> The following member nodes are currently active:");
for (Iterator iter = cluster.getMemberSet().iterator(); iter.hasNext(); )
{
Member member = (Member) iter.next();
out.println(member +
(member.equals(memberThis) ? " <-- this node" : ""));
}
}
}
