Di Java Bagaimana cara mengimplementasikan Memcached Client menggunakan net.spy.spymemcached Library?
Diterbitkan: 2020-12-27
Beberapa hari yang lalu saya telah menulis artikel tentang cara mengatur dan memulai MemCached Server secara lokal di Mac OS Anda dengan beberapa langkah sederhana.
Ada tiga cara berbeda untuk membuat Memcached Java Client.
- metode net.spy.spymemcached
- com.whlin.Memcached – Java – Metode klien
- com.googlecode.xmemcached metode
Dalam tutorial ini kita akan membahas cara menulis Java Client sederhana menggunakan library net.spy.spymemcached . Jika Anda memiliki Proyek Maven di lingkungan Eclipse Anda, silakan tambahkan ketergantungan di bawah ini ke file pom.xml .
Lihatlah operasi set(), get(), delete().
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< dependency > < groupId > net . spy < / groupId > < artifactId > spymemcached < / artifactId > < version > 2.12.3 < / version > < / dependency > |
Setelah Anda memperbarui file pom.xml, coba perbarui proyek Java Anda. Hal selanjutnya adalah menulis program Java sederhana.
implementSpyMemcached.java
Library hadir dengan operasi set() , get() , delete() yang sangat sederhana. Berikut adalah contoh lengkapnya.
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package crunchify . java . tutorials ; import net . spy . memcached . MemcachedClient ; import java . io . IOException ; import java . net . InetSocketAddress ; /** * @author Crunchify.com * Version: 1.0.0 * Details: Use dependency net.spy.spymemcached to retrieve, store Key Value pair from MemCached Server * */ public class CrunchifySpyMemcachedClient { public static void main ( String [ ] args ) { implementCrunchifySpyMemcached ( ) ; } // Approach-1: net.spy.spymemcached // Use dependency net.spy.spymemcached to retrieve, store Key Value pair from MemCached Server private static void implementCrunchifySpyMemcached ( ) { // Get a memcache client operating on the specified memcached locations. MemcachedClient crunchifySpyMemCached ; try { crunchifySpyMemCached = new MemcachedClient ( new InetSocketAddress ( "127.0.0.1" , 11211 ) ) ; log ( "=====> Approach-1: SpyMemcached <=====\n" ) ; log ( "==> Connected to Crunchify's Local Server Successfully." + " Host: localhost, Port: 11211" ) ; // Set an object in the cache (using the default transcoder) regardless of any existing value. // The exp value is passed along to memcached exactly as given, and will be processed per the memcached protocol specification: // The actual value sent may either be Unix time (number of seconds since January 1, 1970, as a 32-bit value), or a number of seconds starting from // current time. In the latter case, this number of seconds may not exceed 60*60*24*30 (number of seconds in 30 days); if the number sent by a // client is larger than that, the server will consider it to be real Unix time value rather than an offset from current time. crunchifySpyMemCached . set ( "Crunchify" , 2000 , "New York" ) ; crunchifySpyMemCached . set ( "Google" , 2000 , "Mountain View" ) ; crunchifySpyMemCached . set ( "PayPal" , 2000 , "San Jose" ) ; crunchifySpyMemCached . set ( "Twitter" , 2000 , "San Francisco" ) ; crunchifySpyMemCached . set ( "Amazon" , 2000 , "Seattle" ) ; log ( "==> Total 5 Records added to MemCached using net.spy.spymemcached method\n" ) ; // Get with a single key and decode using the default transcoder. log ( "Key: Google, Value: " + crunchifySpyMemCached . get ( "Google" ) ) ; log ( "Key: PayPal, Value: " + crunchifySpyMemCached . get ( "PayPal" ) ) ; log ( "Key: Twitter, Value: " + crunchifySpyMemCached . get ( "Twitter" ) ) ; log ( "Key: Amazon, Value: " + crunchifySpyMemCached . get ( "Amazon" ) ) ; log ( "Key: Crunchify, Value: " + crunchifySpyMemCached . get ( "Crunchify" ) ) ; log ( "==> Total 5 Records Retrieved from MemCached using net.spy.spymemcached method\n" ) ; // Delete the given key from the cache. crunchifySpyMemCached . delete ( "Crunchify" ) ; log ( "==> Key:Crunchify deleted successfully\n" ) ; log ( "Key: Crunchify, Value: " + crunchifySpyMemCached . get ( "Crunchify" ) ) ; log ( "==> If no record found, it returns NULL\n" ) ; } catch ( IOException e ) { // Prints this throwable and its backtrace to the standard error stream e . printStackTrace ( ) ; } } private static void log ( Object object ) { System . out . println ( object ) ; } } |
Mulai MemCached Server secara lokal
Buka jendela Terminal dan ketik perintah memcached -d -p 11211 .
Tutorial: Bagaimana Cara Menginstal dan Mengonfigurasi Proses/Server Memcached di Mac OS X?
Keluaran Konsol Eclipse:
Jalankan saja program di atas sebuah Aplikasi Java dan Anda akan melihat hasil seperti ini.
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2018 - 12 - 07 16 : 25 : 45.437 INFO net . spy . memcached . MemcachedConnection : Setting retryQueueSize to - 1 2018 - 12 - 07 16 : 25 : 45.459 INFO net . spy . memcached . MemcachedConnection : Added { QA sa =/ 127.0.0.1 : 11211 , #Rops=0, #Wops=0, #iq=0, topRop=null, topWop=null, toWrite=0, interested=0} to connect queue ===== > Approach - 1 : SpyMemcached < ===== == > Connected to Crunchify ' s Local Server Sucessfully . Host : localhost , Port : 11211 == > Total 5 Records added to MemCached using net . spy . spymemcached method Key : Google , Value : Mountain View Key : PayPal , Value : San Jose Key : Twitter , Value : San Francisco Key : Amazon , Value : Seattle Key : Crunchify , Value : New York == > Total 5 Records Retrieved from MemCached using net . spy . spymemcached method == > Key : Crunchify deleted successfully Key : Crunchify , Value : null == > If no record found , it returns NULL |
Beri tahu saya jika Anda menghadapi masalah saat menjalankan program. Dalam tutorial berikutnya we will go over another libraries untuk mengatur dan mendapatkan data Memcached.
Apa selanjutnya?
Coba Memcached Java Client Tutorial dengan dua library lagi.