Spring - injection

Wstrzykiwanie zależności w Spring - temat ogólnie znany ale ...

Wstrzykiwanie do konstruktora:

package com.blogspot.programmingmt.spring.injection;
import org.apache.camel.CamelContext;
import org.apache.log4j.Logger;
public class MyTest {
    private static final Logger log = Logger.getLogger(MyTest.class);
    public MyTest(String param1, CamelContext param2, Long param3) {
        if(param1==null)
            log.error("'param1' is NULL");
       
        if(param2==null)
            log.error("'param2' is NULL");
       
        if(param3==null)
            log.error("'param3' is NULL");       
    }
}

Konfiguracja spring:
<bean id="myTest" class="com.blogspot.programmingmt.spring.injection.MyTest">
        <constructor-arg type="java.lang.String" value="..." />
        <constructor-arg type="org.apache.camel.CamelContext" ref="myCamelContext" />
        <constructor-arg type="java.lang.Long" value="60" />
</bean>


Wstrzykiwanie do zmiennych:
package com.blogspot.programmingmt.spring.injection;

import org.apache.camel.CamelContext;
import org.apache.log4j.Logger;

public class MyTest2 {
    private static final Logger log = Logger
    .getLogger(MyTest2.class);
   
    private String param1;
    private CamelContext param2;
    private Long param3;
   
    public String getParam1() {
        return param1;
    }

    public void setParam1(String param1) {
        this.param1 = param1;
    }

    public CamelContext getParam2() {
        return param2;
    }

    public void setParam2(CamelContext param2) {
        this.param2 = param2;
    }

    public Long getParam3() {
        return param3;
    }

    public void setParam3(Long param3) {
        this.param3 = param3;
    }

    public void check() {
        if(param1==null) log.error("'param1' is NULL");
        if(param2==null) log.error("'param2' is NULL");
        if(param3==null) log.error("'param3' is NULL");       
    }
}

Konfiguracja spring:
<bean id="myTest2" class="com.blogspot.programmingmt.spring.injection.MyTest2">
        <property name="param1" value="..." />
        <property name="param2" ref="myCamelContext" />   
        <property name="param3" value="60" />
</bean>