the apache tomcat native，Apache Commons Pool試用小記

import org.apache.commons.pool.impl.GenericKeyedObjectPool;
import org.apache.commons.pool.BaseKeyedPoolableObjectFactory;

/**
* Created by IntelliJ IDEA.
*
* @author leizhimin 2009-10-27 17:46:18
*/
public class Test {
????????public static void main(String[] args) throws Exception {
????????????????//創建一個對象池
????????????????GenericKeyedObjectPool pool = new GenericKeyedObjectPool(new BaseKeyedPoolableObjectFactory() {
????????????????????????@Override
????????????????????????public Object makeObject(Object o) throws Exception {
????????????????????????????????if (o != null && o instanceof User)
????????????????????????????????????????return o;
????????????????????????????????else
????????????????????????????????????????return null;
????????????????????????}
????????????????});

????????????????//添加對象到池，重復的不會重復入池
????????????????pool.addObject("a");
????????????????pool.addObject("b");
????????????????pool.addObject("x");
????????????????pool.addObject(null);
????????????????pool.addObject(null);
????????????????pool.addObject(null);
????????????????pool.addObject(new User("zhangsan", "123"));
????????????????pool.addObject(new User("lisi", "112"));
????????????????pool.addObject(new User("lisi", "112", 32));
????????????????pool.addObject(new User("lisi", "112", 32, "一個爛人！"));


????????????????//清除最早的對象
????????????????pool.clearOldest();

????????????????//獲取并輸出對象
????????????????User u1 = new User("lisi", "112", 32, "一個爛人！");
????????????????System.out.println(pool.borrowObject(u1));
????????????????pool.returnObject(u1,u1);

????????????????//獲取并輸出對象
????????????????User u2 = new User("lisi", "112", 32, "一個爛人！");
????????????????System.out.println(pool.borrowObject(u2));
????????????????pool.returnObject(u2,u2);

????????????????//獲取并輸出對象
????????????????User u3 = new User("lisi", "112", 32);
????????????????System.out.println(pool.borrowObject(u3));
????????????????pool.returnObject(u3,u3);

????????????????//獲取并輸出對象
????????????????User u4 = new User("lisi", "112");
????????????????System.out.println(pool.borrowObject(u4));
????????????????pool.returnObject(u4,u4);

????????????????System.out.println(pool.borrowObject(u4));
????????????????pool.returnObject(u4,u4);
????????????????System.out.println(pool.borrowObject(u4));
????????????????pool.returnObject(u4,u4);
????????????????System.out.println(pool.borrowObject(u4));
????????????????pool.returnObject(u4,u4);
????????????????System.out.println(pool.borrowObject(u4));
????????????????pool.returnObject(u4,u4);
????????????????System.out.println(pool.borrowObject(u4));
????????????????pool.returnObject(u4,u4);
????????????????System.out.println(pool.borrowObject(u4));
????????????????pool.returnObject(u4,u4);
????????????????System.out.println(pool.borrowObject(u4));
????????????????pool.returnObject(u4,u4);





????????????????System.out.println(pool.borrowObject(new User("lisi", "112")));
//????????????????System.out.println(pool.borrowObject(new User("lisi", "112")));

????????????????//輸出池狀態
????????????????System.out.println(pool.getMaxIdle());
????????????????System.out.println(pool.getMaxActive());
????????????????pool.clearOldest();
????????????????pool.close();

????????}
}

class User {
????????private String name;
????????private String pswd;
????????private int age;
????????private String reamark;

????????User() {
????????}

????????User(String name, String pswd) {
????????????????this.name = name;
????????????????this.pswd = pswd;
????????}

????????User(String name, String pswd, int age) {
????????????????this.name = name;
????????????????this.pswd = pswd;
????????????????this.age = age;
????????}

????????User(String name, String pswd, int age, String reamark) {
????????????????this.name = name;
????????????????this.pswd = pswd;
????????????????this.age = age;
????????????????this.reamark = reamark;
????????}

????????public String getName() {
????????????????return name;
????????}

????????public void setName(String name) {
????????????????this.name = name;
????????}

????????public String getPswd() {
????????????????return pswd;
????????}

????????public void setPswd(String pswd) {
????????????????this.pswd = pswd;
????????}

????????public int getAge() {
????????????????return age;
????????}

????????public void setAge(int age) {
????????????????this.age = age;
????????}

????????public String getReamark() {
????????????????return reamark;
????????}

????????public void setReamark(String reamark) {
????????????????this.reamark = reamark;
????????}

????????@Override
????????public boolean equals(Object o) {
????????????????if (this == o) return true;
????????????????if (o == null || getClass() != o.getClass()) return false;

????????????????User user = (User) o;

????????????????if (!name.equals(user.name)) return false;
????????????????if (!pswd.equals(user.pswd)) return false;

????????????????return true;
????????}

????????@Override
????????public int hashCode() {
????????????????int result = name.hashCode();
????????????????result = 31 * result + pswd.hashCode();
????????????????return result;
????????}

????????@Override
????????public String toString() {
????????????????return "User{" +
????????????????????????????????"name='" + name + '\'' +
????????????????????????????????", pswd='" + pswd + '\'' +
????????????????????????????????", age=" + age +
????????????????????????????????", reamark='" + reamark + '\'' +
????????????????????????????????'}';
????????}
}

import org.apache.commons.pool.impl.GenericObjectPool;
import org.apache.commons.pool.BasePoolableObjectFactory;

import java.util.Random;

/**
* Created by IntelliJ IDEA.
*
* @author leizhimin 2009-10-28 10:51:11
*/
public class Test2 {
????????public static void main(String[] args) throws Exception {
????????????????GenericObjectPool pool = new GenericObjectPool(new BasePoolableObjectFactory() {
????????????????????????public Object makeObject() throws Exception {
????????????????????????????????return new Random().nextFloat();
????????????????????????}
????????????????});

????????????????pool.addObject();
????????????????pool.addObject();
????????????????pool.addObject();
????????????????pool.addObject();
????????????????pool.addObject();
????????????????pool.addObject();
????????????????pool.addObject();
????????????????pool.addObject();
????????????????pool.addObject();
????????????????pool.addObject();
????????????????pool.addObject();
????????????????pool.addObject();

????????????????Object o = pool.borrowObject();
????????????????System.out.println(o);
????????????????pool.returnObject(o);

????????????????Object o1 = pool.borrowObject();
????????????????System.out.println(o1);

????????????????Object o2 = pool.borrowObject();
????????????????System.out.println(o2);

????????????????Object o3 = pool.borrowObject();
????????????????System.out.println(o3);

????????????????Object o4 = pool.borrowObject();
????????????????System.out.println(o4);


????????????????Object o5 = pool.borrowObject();
????????????????System.out.println(o5);


????????????????Object o6 = pool.borrowObject();
????????????????System.out.println(o6);

????????????????Object o7 = pool.borrowObject();
????????????????System.out.println(o7);

????????????????Object o8 = pool.borrowObject();
????????????????System.out.println(o8);

????????????????pool.returnObject(o1);
????????????????pool.returnObject(o2);
????????????????pool.returnObject(o3);
????????????????pool.returnObject(o4);
????????????????pool.returnObject(o5);
????????????????pool.returnObject(o6);
????????????????pool.returnObject(o7);
????????????????pool.returnObject(o8);

????????????????Object o9 = pool.borrowObject();
????????????????System.out.println(o9);
????????????????pool.returnObject(o9);

????????????????Object o10 = pool.borrowObject();
????????????????System.out.println(o10);
????????????????pool.returnObject(o10);

????????????????Object o11 = pool.borrowObject();
????????????????System.out.println(o11);
????????????????pool.returnObject(o11);

????????????????Object o12 = pool.borrowObject();
????????????????System.out.println(o12);
????????????????pool.returnObject(o12);

????????????????Object o13 = pool.borrowObject();
????????????????System.out.println(o13);
????????????????pool.returnObject(o13);

????????}
}