AEM 6.3 - 使用 OSGi R6 注释创建事件处理程序

Question

我按照https://github.com/nateyolles/aem-osgi-annotation-demo/blob/master/core/src/main/java/com/nateyolles/aem/osgiannotationdemo/core/listeners/SampleOsgiResourceListener.java 创建了一个事件处理程序，它工作正常。但是，我收到警告“SlingConstants.TOPIC_RESOURCE_ADDED 字段已弃用”。我做了一些搜索，发现了这个线程：https://forums.adobe.com/thread/2325819

以下是我面临的挑战：

1) 我想为我的事件处理程序创建一个单独的配置接口。我试过了，它不起作用

package com.aem.sites.interfaces;

import org.apache.sling.api.SlingConstants;
import org.osgi.service.event.EventConstants;
import org.osgi.service.metatype.annotations.AttributeDefinition;
import org.osgi.service.metatype.annotations.AttributeType;
import org.osgi.service.metatype.annotations.ObjectClassDefinition;

@ObjectClassDefinition(name = "Temperature Listener Configuration")
public @interface TemperatureListenerConfiguration {

    @AttributeDefinition(
            name = EventConstants.EVENT_FILTER,
            description = "Configurable paths for temperature event listener",
            type = AttributeType.STRING
            )
    String getPaths() default "/content/aemsite/en/jcr:content/root/responsivegrid/banner";

    @AttributeDefinition(
            name = EventConstants.EVENT_TOPIC,
            description = "Event types",
            type = AttributeType.STRING
            )
    String[] getEventTypes() default  {SlingConstants.TOPIC_RESOURCE_ADDED,SlingConstants.TOPIC_RESOURCE_CHANGED, SlingConstants.TOPIC_RESOURCE_REMOVED};

}

package com.aem.sites.listeners;

import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Modified;
import org.osgi.service.event.Event;
import org.osgi.service.event.EventHandler;
import org.osgi.service.metatype.annotations.Designate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.aem.sites.interfaces.TemperatureListenerConfiguration;

@Component(immediate=true,
service=EventHandler.class,
configurationPid = "com.aem.sites.listeners.EventHandler")
@Designate(ocd=TemperatureListenerConfiguration.class)
public class TemperaturePropertyListener implements EventHandler{

     private final Logger logger = LoggerFactory.getLogger(getClass());

    @Override
    public void handleEvent(Event event) {
        logger.info("*********************Event handler*****************************");

    }

    @Activate
    @Modified
    public void activate(TemperatureListenerConfiguration config) {
        //config.getPaths();
        logger.info("**************************TemperaturePropertyListener******************activate**********************");
    }

}

我还想要 SlingConstants 已弃用问题的解决方案。不确定 ResourceChangeListener 是否是我的问题的答案，如果是，那么代码中的所有内容将如何协同工作。

提前致谢

================================ 最新代码

package com.aem.sites.listeners;

import java.util.List;

import org.apache.sling.api.resource.observation.ResourceChange;
import org.apache.sling.api.resource.observation.ResourceChangeListener;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Modified;
import org.osgi.service.metatype.annotations.Designate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.aem.sites.interfaces.TemperatureListenerConfiguration;


@Component(immediate=true,
service=ResourceChangeListener.class,
configurationPid = "com.aem.sites.listeners.TemperaturePropertyListener")
@Designate(ocd=TemperatureListenerConfiguration.class)
public class TemperaturePropertyListener implements ResourceChangeListener{

     private final Logger logger = LoggerFactory.getLogger(getClass());

    @Override
    public void onChange(List<ResourceChange> changes) {
        for (final ResourceChange change : changes) {
            logger.info("**************************TemperaturePropertyListener******************change type**********************"+change.getType());
        }

    }


    @Activate
    @Modified
    public void activate(TemperatureListenerConfiguration config) {
        //config.getPaths();
        logger.info("**************************TemperaturePropertyListener******************activate**********************");
    }
}

界面

package com.aem.sites.interfaces;

import org.apache.sling.api.resource.observation.ResourceChangeListener;
import org.osgi.service.metatype.annotations.AttributeDefinition;
import org.osgi.service.metatype.annotations.AttributeType;
import org.osgi.service.metatype.annotations.ObjectClassDefinition;

@ObjectClassDefinition(name = "Temperature Listener Configuration")
public @interface TemperatureListenerConfiguration {

    @AttributeDefinition(
            name = ResourceChangeListener.PATHS,
            description = "Configurable paths for temperature event listener",
            type = AttributeType.STRING
            )
    String[] getPaths() default {"/content/aemsite/en/jcr:content/root/responsivegrid/banner"};

    @AttributeDefinition(
            name = ResourceChangeListener.CHANGES,
            description = "Event types",
            type = AttributeType.STRING
            )
    String[] getEventTypes() default  {"ADDED","REMOVED","CHANGED","PROVIDER_ADDED", "PROVIDER_REMOVED"};

}

Answer 1

在此处查看 sling 9 文档中 org.apache.sling.api.SlingConstants 的 Javadoc：http://sling.apache.org/apidocs/sling9/org/apache/sling/api/SlingConstants.html

它明确告诉您TOPIC_RESOURCE_ADDED 已被弃用：

已弃用。改为注册ResourceChangeListener

阅读ResourceChangeListener 的文档，此外，您还可以查看来自ACS Samples 的sample SCR service impl：

将其转换为 R6 声明式服务应该不难。

另外，这里有两个来自 sling 项目 ResourceBackedPojoChangeMonitor 和 OsgiObservationBridge 的例子

尝试用同一类中的属性来模仿那些类。