Servicegebruikers
Leer hoe u servicegebruikers in uw AEM code kunt maken en gebruiken om gecontroleerde, programmatische toegang tot de AEM opslagplaats te bieden.
Bronnen
Code
ContentStatisticsImpl.java
/core/src/main/java/com/adobe/aem/wknd/examples/core/statistics/impl/ContentStatisticsImpl.java
package com.adobe.aem.wknd.examples.core.statistics.impl;
import com.adobe.aem.wknd.examples.core.statistics.ContentStatistics;
import org.apache.sling.api.resource.LoginException;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.api.resource.ResourceResolverFactory;
import org.apache.sling.serviceusermapping.ServiceUserMapped;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.jcr.query.Query;
import java.util.Collections;
import java.util.Iterator;
import java.util.Map;
@Component(
reference = {
@Reference(
name = SERVICE_USER_SUB_SERVICE_ID,
service = ServiceUserMapped.class,
target = "(subServiceName=wknd-examples-statistics)"
)
}
)
public class ContentStatisticsImpl implements ContentStatistics {
private static final Logger log = LoggerFactory.getLogger(ContentStatisticsImpl.class);
@Reference
private ResourceResolverFactory resourceResolverFactory;
@Override
public int getAssetsCount(final ResourceResolver resourceResolver) {
return getNumberOfAssets(resourceResolver);
}
@Override
public int getAllAssetsCount() {
// Create the Map that specifies the SubService ID
final Map<String, Object> authInfo = Collections.singletonMap(
ResourceResolverFactory.SUBSERVICE,
"wknd-examples-statistics");
// Get the auto-closing Service resource resolver
// Remember, any ResourceResolver you get, you must ensure is closed!
try (ResourceResolver serviceResolver = resourceResolverFactory.getServiceResourceResolver(authInfo)) {
// Do some work with the service user's resource resolver and underlying resources.
// Make sure to do all work that relies on the AEM repository access in the try-block, since the serviceResolver will auto-close when it's left
return queryAndCountAssets(serviceResolver);
} catch (LoginException e) {
log.error("Login Exception when obtaining a User for the Bundle Service: {} ", e);
}
return -1;
}
private int queryAndCountAssets(ResourceResolver resourceResolver) {
final String ASSETS_QUERY = "SELECT * FROM [dam:Asset] WHERE isdescendantnode(\"/content/dam\")";
Iterator<Resource> resources = resourceResolver.findResources(ASSETS_QUERY, Query.JCR_SQL2);
int count = 0;
while (resources.hasNext()) { count++; resources.next(); }
log.info("User [ {} ] found [ {} ] assets", resourceResolver.getUserID(), count);
return count;
}
@Activate
protected void activate() {
// We can use service users in the context's where no natural Sling security context is available to us,
// which is usually outside the context of a Sling HTTP request.
log.debug("Begin calling getAllAssetsCount() from the @Activate method");
int count = getAllAssetsCount();
log.debug("Finished calling getAllAssetsCount() from the @Activate method with count [ {} ]", count);
}
}
org.apache.sling.jcr.repoinit.RepositoryInitializer-wknd-examples-statistics.config
/ui.config/src/main/content/jcr_root/apps/wknd-examples/osgiconfig/config.author/org.apache.sling.jcr.repoinit.RepositoryInitializer-wknd-examples-statistics.config
scripts=["
create service user wknd-examples-statistics-service with forced path system/cq:services/wknd-examples
# When using principal ACLs, the service user MUST be created under system/cq:services
set principal ACL for wknd-examples-statistics-service
allow jcr:read on /content/dam
end
"]
org.apache.sling.serviceusermapping.impl.ServiceUserMapperImpl.amended-wknd-examples.cfg.json
/ui.config/src/main/content/jcr_root/apps/wknd-examples/osgiconfig/config.author/org.apache.sling.serviceusermapping.impl.ServiceUserMapperImpl.amended-wknd-examples.cfg.json
{
"user.mapping": [
"wknd-examples.core:wknd-examples-statistics=[wknd-examples-statistics-service]"
]
}
recommendation-more-help
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