Apache的对象池化工具commons-pool


1 / 11 Apache ጱం० commons-pool  Email:suhuanzheng7784877@163.com 1.   ¡ ¢ £ ¤ ¥ ¦ § ¨ ©    ¥   ¥            ! §" # $ %  & ¥ ¦ § ¨ ' ()  * + , ! § - ./ 0    1 2   3 0 + 4 5¦ § ¥ 67 - 1 89 :;< = >   + ¥ ?@ A  = > B C ¥ C D 3 'E F  - OK G !H 1 § I J synchronized  K § ThreadLoacl L MN O P ¥ Q  R 0S T P Q ¥   3 0U VW X   ¥ - YZ  [   ¥  ¥4 \ 7 4 ] ^ _  ` § a   ¥ _ b c P  4 Q ¥ S d e f g 3 0 h i §   ¥ - 2. j    ¢ k 1 0l m ) ¥ no p q r ¥ - q r ¥   0       s t 0     - u v . C D w ll s t 0 j   - x 9 £ ¤ 6 Web yz ¥ DAO{ | } ~ . €  1  ‚ EJB ¥ EAO ƒ  ' 0   ` § T „ …† ‡ˆ  ‰ Š ‹ Š Œ Š Ž  ‘ ’ - e f '“ 0 j  ¥    DAO ”• V – ) — ˜ ™ ¥ š ›    9 : U V š › œ    šž Ÿ ~ x 9   Ÿ ¡¢ Š £ ¤ ‘ ’ ¥ ¦ - ! § AOP § ¨ › ¥ © § LMª« G ¬- Spring ) &­\®  1 6¯ ° - © . ±    ²³´ Web ¦ § ¥  e #rµ < ¶· ¨ G ¬  ¸ V  ¶ · ¹ ´  H| ¢ - ¶· º »    ¥ ] ^ N O  m¼ . ±  0 j     - 3.     ½ s t ¾ 0      ¿  À ¤ § Á n  ¸ < ¥ #   5 Ã Ä Å Æ java.sql.Connection -  Ç l Connection 0      ¿ È £ ¤ ² JDBC É ^ ¥  2 / 11 ÊÊ ! §  Ë 2  ¥ ÌÍ Gˆ   5 ÃÄ ¥ ŠƑ ’ - Connection    £ ¤ ‘ ’ 5 ÃÄ 6  s t È 1 ƒ ~ Î 8 JDBC ¥ Ï ´ Driver ÐÑ Ò … 5 ÃÄ Ó Ô Õ Ö  × £ ¤ 1 •ØÙÚ Û ¥ 5 Ã Ä ÎÜ Õ Ö { Mysql ) Mysql ¥ Õ Ö Š Oracle ) Oracle ¥ ÎÜ Õ Ö ƒ 2 ƒ ~ Î 85 à ÄÓ Ô Õ ÖÝ Þ Ó Ô socket Å Æß à 3 ƒ ~ á Ã â¥ Ó Ô Î à > ã ä å æ ç { m è ä å æ ç ' 0  – 5 ÃÄ §éê Š 5 ÃÄ ëÍ ¥ì L í îï ƒ 4 ƒ ~ Æð5 à Äñ ¥ äåò : î ï ó ôõA § ¥ ÎÜ 0 ö LM Ø÷ 0 âÓ Ô socket Î àX ø   ù e 1ú - YZ java.sql.Connection U V û S T ù . Ó Ô Î à - ü x [ g § ý < ¥ DAO   ¥ ©  . Connection   © ¥  0 1 0 þ e ÿ   ¡ ¢ £ ¤ - À ¤ ¥ #   ' ¦§ ¨ © ¢ /  ¸ V ¢   ›  â  ¥    §   '    ¡¢    © u    × š   ¢      > F .  ! ½ ± "  ¥ #  ” ó $ ù ›   © u  ¥ ¢ .   % & ¢ i ' \  A ç ()  { * + u ð· u ð  ƒ - 8   ! ¾ )   Þ , $ ù ›  - . t / È l ~ 0 1  2 3  4 5 6 ó  7 89 :;- < §   =  ¾ >  12 ?  ó @ A 7 8 9  © u  B ¢     ~~ 9 : ¢  §   l ~ 0 C DE  F A  ¢  H V 0 1 A ç ()  G ¢ H I £¥ + J 3  ß K  ' 1 • . t 4 5 ~ L £ © u ¢   H 3 ' M ½ s t N < - 4.   q   q ¥ O  P F e QR ¨ ¥ S T ¥ ß KU šü V - W X . Y &  § X Z  [ Š & ˆ  \ u   9 : S T ¥ 1 ] §  . t / È ½ ' 4 5 S ^ _ ú `  a b c d u  ; - . — e f g   Ž , ¥ ¥ 5  1 ] § h -   q ' ¦ 0 3 / 11 S T  S ß K i ' ¦ 0   `  ·  [ j ' ¦ 0` §   ¥ k é ñ - U V S d ¥ ' 0 S T P [ ¥¥ ¦ l » - ./ &    U V S d S T P [ yz - R 0 . m S d ² n m ^  g  l0 o   ¥ - u < £ ¤ ¥ É ^ p ¨  Apache ¥ common-pool q r ' 0 Þ  ¥  q s Ú  £ ¤ ¬ ¼ [  t ¥ Æ u  ' ¬ ¼ G   ¥ 6 q r - 5. v wx y w z apache { | A } commons-pool q r  - G lib A § ¥ jar  ~  < Y € classpath ¨ -   a e ‚ q r \ƒ„ [ š › ¥ apache ¥ commos q r … … commons-collections - m ¼ \ U V G a jar I ¢ < classpath - † ‡ x ˆ ¥ v w 9A /ApacheCommonPool/lib/commons-collections-2.1.1.jar /ApacheCommonPool/lib/commons-pool-1.5.6-javadoc.jar /ApacheCommonPool/lib/commons-pool-1.5.6-sources.jar /ApacheCommonPool/lib/commons-pool-1.5.6.jar ‰ " ¥ q r v w Š ¢ x ˆ ‹ 6. ! § # ^ ² a ¡ ^ ¨  £ ¤ Œ  A Java Ž §  ¦  3 0  Î § ¥ j   String ¥ q r - ó Œ  A ¹ õ  ¥ e Û  ¥ q r - ó  l ‘ | ~ String 0 €  1 o p 6 q r ¥  y w java.lang.String   ’ ' 1 0 s t      “ , r String  3 €  1 § ¢ 8 s t @ A © ¢ ¥ 8 ^ ”  • Q E  ¥  = Z JVM Š ¢  String 6  q r – K - ) String q S d Š ¢ © ˆ ¥ — ˜ ™ š §  o - ² a ! § String Ê Ê 0 › œ 9 Ç! § q r‘ ’   - ef ¦ § ¨    1 V q r String  - ö ž ' ) |   1 Ÿ    - y w I E ‰ " ¥ POJO e Û  ÌÍ - package key; public class Person { String id ; String name ; 4 / 11 public Person() { } public Person(String id, String name) { this .id = id; this .name = name; } public String getId() { return id ; } public void setId(String id) { this .id = id; } public String getName() { return name ; } public void setName(String name) { this .name = name; } @Override public String toString() { return "id:" + id + "---name:" + name ; } } . §é POJO¡ Ë ‰ "  ' ( ) id P name ¢  - A § 0 ! § q s £ ß K ^ ¤ /** * ¥ ¦ § ¨ * @author liuyan */ class KeyedPoolableObjectFactorySample extends BaseKeyedPoolableObjectFactory { 5 / 11 /** * © ª « ¬ ­ ® */ @SuppressWarnings ("unchecked" ) public Object makeObject(Object clsName) throws Exception { if (clsName == null || !(clsName instanceof String) || "".equals(clsName)) { throw new RuntimeException( " ¯ ° ±² ³ "); } System. out .println( " ©ª ´ µ ¶ · « ¬ :" + clsName); Class cls = Class. forName ((String) clsName); Object obj = cls.newInstance(); return obj; } @Override public void activateObject(Object key, Object obj) throws Exception { // TODO Auto-generated method stub super .activateObject(key, obj); System. out .println( "¸ ¹ « ¬ "); } @Override public void destroyObject(Object key, Object obj) throws Exception { // TODO Auto-generated method stub super .destroyObject(key, obj); System. out .println( "º » « ¬ "); } @Override public void passivateObject(Object key, Object obj) throws Exception { // TODO Auto-generated method stub super .passivateObject(key, obj); 6 / 11 System. out .println( "¼ ½ « ¬ "); } @Override public boolean validateObject(Object key, Object obj) { // TODO Auto-generated method stub System. out .println( "¾ ¿ « ¬ "); return super .validateObject(key, obj); } } q s £   ' ¦ 0 S T ¥ `  ß K i  U V © À   ¥  ' ` § š makeObject() \ 7 Á š › ¥ \ 7 Š ¢ ² ^ ¤ ¨ LM  l ‘ -  V ' 0 à » \ 7 validateObject 0 à » 0 ö Š ¢Ä ²  ¬ ˜ § ¥  - ² a ¡ ^ ¨ ^ § ÅÆÇ í  € È  LM e #r - A § 0 ! § ^ ¤ /** * ÉÊ * @author liuyan * */ public class KeyedObjectPoolSample { /** * @param args */ public static void main(String[] args) { Object obj = null ; KeyedPoolableObjectFactory factory = new KeyedPoolableObjectFactorySample(); KeyedObjectPoolFactory poolFactory = new StackKeyedObjectPoolFactory( factory); 7 / 11 KeyedObjectPool pool = poolFactory.createPool(); String key = null ; try { key = "java.lang.String" ; obj = pool.borrowObject(key); obj = "obj1" ; // pool.returnObject(key, obj ); obj = pool.borrowObject(key); pool.returnObject(key, obj); obj = pool.borrowObject(key); System. out .println(obj); System. out .println( "============ ËÌ ´ µ« ¬ Person=============" ); key = "key.Person" ; Person person1 = (Person) pool.borrowObject(key); person1.setId( "1" ); person1.setName( " Í ÎÏ "); System. out .println(person1); pool.returnObject(key, person1); System. out .println(person1); Person person2 = (Person) pool.borrowObject(key); person2.setId( "2" ); person2.setName( " Ð ÑÒ "); Person person3 = (Person) pool.borrowObject(key); person3.setId( "3" ); person3.setName( " ´ ÓÔ "); Person person4 = (Person) pool.borrowObject(key); person4.setId( "4" ); 8 / 11 person4.setName( " Õ Ö × "); System. out .println(person1); System. out .println(person2); System. out .println(person3); System. out .println(person4); pool.returnObject(key, person3); Person person5 = (Person) pool.borrowObject(key); System. out .println(person5); } catch (Exception e) { e.printStackTrace(); } finally { try { pool.close(); System. out .println(pool); } catch (Exception e) { e.printStackTrace(); } } } } y ww ⠗ ˜ ™    š § o  “obj1” - Æ ù z  q ¨ [ — ˜ ™   E  obj æ ¨ . [ E  ¥   Ø q ¨ ) ¬ ˜ § ¥    ûÆ I =  9 : ” )  ` § makeObject() Ù À ¥   E  I obj š § - § ˆ  ` § returnObject \ 7 G   \ I q  - À ¤ ó & A § ! § Person    w z q ¨ [ Person   person1 - ¢ k q   § F ² \ ” ) Ú Ç Person   -  q ¨  Ûo   \ I  q  - .   q  ¨ ' ) % ! § 8 ¥  = Z ¢  Š ¢ > Q Œ P ¥   - A § person2 P  ¨ q  [  Person   a  q   Š ¢ )  ¬ ˜ § ¥   - ½ t 1 • ` § makeObject \ 7  û Æ G Š ) ¥   Ü u I k é ñ G ¬- k   š Û o - Ý ÞÞ ¥ 1 ß \ B Œ   2 à á   ½ t .   Þ ” ¥ person1 3 0 2 à á   person1 ¥ š § æ ⠔ P  ÊÊ 0 š 9 / 11 § ¥ ½ ã ä å ¥ — ˜ ™ o > Q  P r - =  \ ” L .   Ü \ I q ¿  person3 P  ' ¨ q  V    q  l ~ 0 LL  £ I 6 make h <  =  ¾ ` §  markObject \ 7 ©  À ¥  - . À ¥  ' 0 3 æ -  A ¥ 4  çè 3 0 À ¥ - ¢ é M < pool.returnObject(key, person3); Person person5 = (Person) pool.borrowObject(key); System. out .println(person5); > F person5 0 ÞÞ ê \ ¥ ˜ §   …… 3 æ - é M  ë í ì 9A ©ª ´ µ ¶ · « ¬ :java.lang.String ¸ ¹ « ¬ ¾ ¿ « ¬ ©ª ´ µ ¶ · « ¬ :java.lang.String ¸ ¹ « ¬ ¾ ¿ « ¬ ¾ ¿ « ¬ ¼ ½ « ¬ ¸ ¹ « ¬ ¾ ¿ « ¬ ~~~ ============ ËÌ ´ µ « ¬ Person============= ©ª ´ µ ¶ · « ¬ :key.Person ¸ ¹ « ¬ ¾ ¿ « ¬ id:1---name: Í ÎÏ 10 / 11 ¾ ¿ « ¬ ¼ ½ « ¬ id:1---name: Í ÎÏ ¸ ¹ « ¬ ¾ ¿ « ¬ ©ª ´ µ ¶ · « ¬ :key.Person ¸ ¹ « ¬ ¾ ¿ « ¬ ©ª ´ µ ¶ · « ¬ :key.Person ¸ ¹ « ¬ ¾ ¿ « ¬ id:2---name: Ð ÑÒ id:2---name: Ð ÑÒ id:3---name: ´ ÓÔ id:4---name: Õ Ö × ¾ ¿ « ¬ ¼ ½ « ¬ ¸ ¹ « ¬ ¾ ¿ « ¬ id:3---name: ´ ÓÔ org.apache.commons.pool.impl.StackKeyedObjectPool contains 0 distinct pools: ¢ 8 . #  £ ¤ \ ¦ í î ï   e ' 0 ¦ . ¬  bc P  BC { get ƒ Š Ûo { set ƒ 11 / 11 ¥   3 1 o p q r -   ð j § 8  ./ ¥    e f g ñ A  ð j § 8 ¥ ò ó - . / þ e ô Ù  bc P § õ ô 1 ö ¥ ] ^ N O C D- ¦ í 0  ÷ ÊÊ ý * ž Ÿ ¥ \ 7  = Z 1 Ú ø BC bc P ¥    = Z ©   W X   ¥   ” o p q r - < Ò 0 q r \ 0 " #  . ¢ k ” ) €  ¥ v ®  ©   & H ¥ e f yz U V . / 6 ù p K -
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