- Memcached Basics
- Memcached - Home
- Memcached - Overview
- Memcached - Environment
- Memcached - Connection
- Memcached Storage Commands
- Memcached - Set Data
- Memcached - Add Data
- Memcached - Replace Data
- Memcached - Append Data
- Memcached - Prepend Data
- Memcached - CAS
- Memcached Retrieval Commands
- Memcached - Get Data
- Memcached - Get CAS Data
- Memcached - Delete Key
- Memcached - Delete Data
- Memcached - Incr/Decr
- Memcached Statistics Commands
- Memcached - Stats
- Memcached - Stats Items
- Memcached - Stats Slabs
- Memcached - Stats sizes
- Memcached - Clear Data
- Memcached Useful Resources
- Memcached - Quick Guide
- Memcached - Useful Resources
- Memcached - Discussion
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Memcached - Set Data
Memcached set command is used to set a new value to a new or existing key.
Syntax
The basic syntax of Memcached set command is as shown below −
set key flags exptime bytes [noreply] value
The keywords in the syntax are as described below −
key − It is the name of the key by which data is stored and retrieved from Memcached.
flags − It is the 32-bit unsigned integer that the server stores with the data provided by the user, and returns along with the data when the item is retrieved.
exptime − It is the expiration time in seconds. 0 means no delay. If exptime is more than 30 days, Memcached uses it as UNIX timestamp for expiration.
bytes − It is the number of bytes in the data block that needs to be stored. This is the length of the data that needs to be stored in Memcached.
noreply (optional) - It is a parameter that informs the server not to send any reply.
value − It is the data that needs to be stored. The data needs to be passed on the new line after executing the command with the above options.
Output
The output of the command is as shown below −
STORED
STORED indicates success.
ERROR indicates incorrect syntax or error while saving data.
Example
In the following example, we use tutorialspoint as the key and set value Memcached in it with an expiration time of 900 seconds.
set tutorialspoint 0 900 9 memcached STORED get tutorialspoint VALUE tutorialspoint 0 9 Memcached END
Set Data Using Java Application
To set a key in Memcached server, you need to use Memcached set method.
Example
import net.spy.memcached.MemcachedClient; public class MemcachedJava { public static void main(String[] args) { // Connecting to Memcached server on localhost MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211)); System.out.println("Connection to server sucessfully"); System.out.println("set status:"+mcc.set("tutorialspoint", 900, "memcached").done); // Get value from cache System.out.println("Get from Cache:"+mcc.get("tutorialspoint")); } }
Output
On compiling and executing the program, you get to see the following output −
Connection to server successfully set status:true Get from Cache:memcached