How to store the key size more than 250 characters in memcached using java code?

[sekhar mekala]

HI Team,

 I need to store the key size more than 250 characters in memcached server.

I am tried with my code:

code:

 MemcachedClient client = new MemcachedClient((new InetSocketAddress("192.168.7.134", 11211)));

 String key="292FEC76-5F1C-486F-85A5-09D88096F098_VirtualizationObjectNamesInfo_CustomerManagementObject#292FEC76-5F1C-486F-85A5-09D88096F098#"+ "(TENANT_PARENTOBJECTID='FFCEF160-BAEE-4876-9C45-8D179DC90481'$OR$TENANT_PARENTOBJECTID='B813170B-3390-4B51-9E6C-81EF3D44BB94'$"+ "OR$TENANT_PARENTOBJECTID='CD8C669F-A8AA-4987-9B71-ABFBF5207014'$OR$TENANT_PARENTOBJECTID='373F4223-BD1E-4B4C-AE86-F0B09F3D7FBE'$"+ "OR$TENANT_PARENTOBJECTID='1DE854CA-2E51-4B6B-A3F2-2EC1A9626D1D'$OR$TENANT_PARENTOBJECTID='32C4B07F-804B-45E1-A594-03472945FC1E'$OR"+ "$TENANT_PARENTOBJECTID='608E4495-8FF9-49DB-8476-CAFCFF84A5B1'$OR"+ "$TENANT_PARENTOBJECTID='ACFEB0D5-586E-45C1-A3B4-24781C1D07A5')#(TENANT_CHILDOBJECTID='FFCEF160-BAEE-4876-9C45-8D179DC90481'$OR"+ "$TENANT_CHILDOBJECTID='B813170B-3390-4B51-9E6C-81EF3D44BB94'$OR$TENANT_CHILDOBJECTID='CD8C669F-A8AA-4987-9B71-ABFBF5207014'$OR"+ "$TENANT_CHILDOBJECTID='373F4223-BD1E-4B4C-AE86-F0B09F3D7FBE'$OR$TENANT_CHILDOBJECTID='1DE854CA-2E51-4B6B-A3F2-2EC1A9626D1D'$OR"+ "$TENANT_CHILDOBJECTID='32C4B07F-804B-45E1-A594-03472945FC1E'$OR$TENANT_CHILDOBJECTID='608E4495-8FF9-49DB-8476-CAFCFF84A5B1'$OR"+ "$TENANT_CHILDOBJECTID='ACFEB0D5-586E-45C1-A3B4-24781C1D07A5')#978754F1-AE6D-4201-85B3-0008BD3EE190_v1.0";

  

System.out.println("Key size:" + key.length());

client.set(key, 3600, "teststse");

System.out.println(client.get(key));

Error:

2014-12-30 19:20:57.944 INFO net.spy.memcached.MemcachedConnection:  Added {QA sa=/192.168.7.134:11211, #Rops=0, #Wops=0, #iq=0, topRop=null, topWop=null, toWrite=0, interested=0} to connect queue

Key size:1184

2014-12-30 19:20:57.947 INFO net.spy.memcached.MemcachedConnection:  Connection state changed for sun.nio.ch.SelectionKeyImpl@6c6455ae

Exception in thread "main" java.lang.IllegalArgumentException: Key is too long (maxlen = 250)

at net.spy.memcached.util.StringUtils.validateKey(StringUtils.java:69)

at net.spy.memcached.MemcachedConnection.enqueueOperation(MemcachedConnection.java:745)

at net.spy.memcached.MemcachedClient.asyncStore(MemcachedClient.java:310)

at net.spy.memcached.MemcachedClient.set(MemcachedClient.java:844)

at MemcachedConnectionPooling.ClearedMemcachedServer.main(ClearedMemcachedServer.java:42)

Client: spymemcached

Server: memcached

plz help me.

Thanks in advace

Sekhar.

[Zhiwei Chan]

It is a limitation of the memcached server, so you have to change the 'KEY_MAX_LENGTH' value and re-compile your memcached server.

But I don't think it is necessary to do this, it waste a lot of memory by the long key.

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[Ryan McElroy]

You can't; its a on-purpose limitation of memcached. What you can do is use md5 or sha1 to hash your string and use that as a key.

Long keys are usually a sign of misuse of memcached, though, so it often helps to take a step back and evaluate what you actually need to put into your key.

~Ryan (mobile)

[sekhar mekala]

HI Ryan,

Thanks for your valuable suggestion. But using md5 or sha1 to Hash your string, This key is collision or not. 

Please help me.

Thanks

Sekhar

[Zhiwei Chan]

In fact, it is almost impossible to meet a conflict. I think it is safe enough.  see this link for more info: http://en.wikipedia.org/wiki/SHA-1

2015-01-07 14:11 GMT+08:00 sekhar mekala <msekh...@gmail.com>:

HI Ryan,

Thanks for your valuable suggestion. But using md5 or sha1 to Hash your string, This key is collision or not. 

Please help me.

Thanks

Sekhar

On Tuesday, December 30, 2014 10:52:24 PM UTC+5:30, Ryan McElroy wrote: