关于java:Guice-AOPMatcher

本教程次要具体解说Guice的一些AOP形式,通过该简略教程让咱们能够疾速应用Guice进行AOP开发,后续咱们会更深刻解说更多Guice中的AOP.

根底环境

初始化我的项目

• 初始化我的项目

mvn archetype:generate -DgroupId=io.edurt.lc.guice -DartifactId=guice-aop-matcher -DarchetypeArtifactId=maven-archetype-quickstart -Dversion=1.0.0 -DinteractiveMode=false

• 批改pom.xml减少Guice依赖

<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0"         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    <parent>        <artifactId>lc-guice</artifactId>        <groupId>io.edurt.lc.guice</groupId>        <version>1.0.0</version>    </parent>    <modelVersion>4.0.0</modelVersion>    <artifactId>guice-aop-matcher</artifactId>    <name>Learning Center for Guice AOP(Matcher)</name>    <properties>        <maven.compiler.source>1.8</maven.compiler.source>        <maven.compiler.target>1.8</maven.compiler.target>    </properties>    <dependencies>        <dependency>            <groupId>com.google.inject</groupId>            <artifactId>guice</artifactId>            <version>4.2.3</version>        </dependency>        <dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>4.12</version>            <scope>test</scope>        </dependency>    </dependencies></project>

初始化Service

首先咱们定义服务Service，这个服务有一个简略的办法println.

• 在src/main/java目录下新建io.edurt.lc.guice.GuiceAopMatcherService类文件,在文件输出以下内容

package io.edurt.lc.guice;import com.google.inject.ImplementedBy;@ImplementedBy(value = GuiceAopMatcherServiceImpl.class)public interface GuiceAopMatcherService{    void println(String input);}

• 在src/main/java目录下新建io.edurt.lc.guice.GuiceAopMatcherServiceImpl类文件,在文件输出以下内容

package io.edurt.lc.guice;public class GuiceAopMatcherServiceImpl        implements GuiceAopMatcherService{    @Override    public void println(String input)    {        System.out.println("Matcher input : " + input);    }}

AOP注入依赖

Guice容许在关联AOP之前将AOP的依赖都注入到容器中!

• 在src/main/java目录下新建io.edurt.lc.guice.GuiceAopMatcherMethodInterceptor类文件,在文件输出以下内容

package io.edurt.lc.guice;import org.aopalliance.intercept.MethodInterceptor;import org.aopalliance.intercept.MethodInvocation;public class GuiceAopMatcherMethodInterceptor        implements MethodInterceptor{    @Override    public Object invoke(MethodInvocation methodInvocation)            throws Throwable    {        String methodName = methodInvocation.getMethod().getName();        long startTime = System.nanoTime();        System.out.println(String.format("Before Method[%s] start in %s", methodName, startTime));        Object response;        try {            response = methodInvocation.proceed();        }        finally {            long endTime = System.nanoTime();            System.out.println(String.format("After Method[%s] stop %s, Elapsed(nanosecond): %d", methodName, endTime, (endTime - startTime)));        }        return response;    }}

• 在src/test/java目录创立io.edurt.lc.guice.GuiceAopJavaServiceMatcher类文件进行定义的服务进行测试,增加以下代码

package io.edurt.lc.guice;import com.google.inject.matcher.Matcher;public class GuiceAopJavaServiceMatcher        implements Matcher<Class<?>>{    @Override    public boolean matches(Class<?> aClass)    {//        return aClass == GuiceAopMatcherService.class;        return aClass == GuiceAopMatcherServiceImpl.class;    }    @Override    public Matcher<Class<?>> and(Matcher<? super Class<?>> matcher)    {        return null;    }    @Override    public Matcher<Class<?>> or(Matcher<? super Class<?>> matcher)    {        return null;    }}

• 接下来在src/test/java目录创立io.edurt.lc.guice.TestGuiceAopJavaServiceMatcher类文件进行定义的服务进行测试,增加以下代码

package io.edurt.lc.guice;import com.google.inject.Guice;import com.google.inject.Injector;import com.google.inject.matcher.Matchers;import org.junit.Test;public class TestGuiceAopJavaServiceMatcher{    @Test    public void test()    {        Injector injector = Guice.createInjector(binder -> binder.bindInterceptor(new GuiceAopJavaServiceMatcher(),                Matchers.any(),                new GuiceAopMatcherMethodInterceptor()));        GuiceAopMatcherService javaServiceMatcher = injector.getInstance(GuiceAopMatcherServiceImpl.class);        javaServiceMatcher.println("Hello Guice!!!");    }}

咱们运行程序输入

Before Method[println] start in 174453945750833Matcher input : Hello Guice!!!After Method[println] stop 174453952765375, Elapsed(nanosecond): 7014542

须要留神的是:
return aClass == GuiceAopMatcherService.class; 这里断定的是绝对的类,在咱们的示例中是return aClass == GuiceAopMatcherServiceImpl.class;
如果要应用父类主动转换的话须要本人解析类的实现即可

源码地址

GitHub