Using script reference in AEM ContextHub

While creating audience in AEM contextHub, we see a component called Script Reference. When we drag-n-drop the component, we don't see any scripts by default in the drop down.

URL Shortening in AEM

Content pages in AEM start with path /content/. It is best practice to hide /content/site in the URL.

https://<domain>/content/site/en/page.html

Below configs show how to achieve URL shortening on both AEM server and dispatcher.

Configs on AEM Server:

·         There are many ways to configure the rewrites on publish server. e.g. Resource Resolver, Vanity URLs, Sling mapping.

·         Configuring the Apache Sling Resource Resolver Factory is one of the ways to configure rewrites. This service needs to be configured on the publish server so that if someone hits the publish server directly; we see the correct rules applied there.
Make sure that the publish server has the below configuration applied

Backend forbids caching, sent: 'Dispatcher: no-cache'

When using dispatcher if we use below code then pages will not be cached in dispatcher. Error in dispatcher.log is "Backend forbids caching, sent: 'Dispatcher: no-cache'"

response.setHeader("Dispatcher", "no-cache");                       
response.setHeader("Pragma", "no-cache");
response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
response.setDateHeader("Expires", 0);

Annotation @reference is disallowed for this location

Issue: 

Annotation @reference is disallowed for this location.

Solution: 

There are multiple ways to use @Reference annotations in OSGi annotations.

Option 1: 

@Reference

MyService myService;

Option 2:

private MyService myService;

@Reference

public void bindMyService(MyService myService) {

     this.myService = myService;

}

public void unbindMyService(MyService myService) {

     this.myService = myService;

}

To avoid this error use option 2.

Plugin org.apache.maven.plugins:maven-dependency-plugin:2.10 or one of its dependencies could not be resolved

I tried to create AEM 6.4 project using maven archetype 10. When tried to build the project got below error.

Error:
[ERROR] Plugin org.apache.maven.plugins:maven-dependency-plugin:2.10 or one of its dependencies could not be resolved:
 Failed to read artifact descriptor for org.apache.maven.plugins:maven-dependency-plugin:jar:2.10: 
 Could not transfer artifact org.apache.maven.plugins:maven-dependency-plugin:pom:2.10 from/to central 
 ( https://repo.maven.apache.org/maven2): Access denied to: https://repo.maven.apac he.org/maven2/org/apache/maven/plugins/maven-dependency-plugin/2.10/maven-depend ency-plugin-2.10.pom , ReasonPhrase:Forbidden. -> [Help 1]

Solution:

Check if you can download the jar from browser http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.5/maven-clean-plugin-2.5.jar.

If you are able to download the jar then your browser has connectivity to central but maven doesn't. So try using a proxy in settings.xml

If above didn't work try to build using command
mvn clean install -s

com.adobe.cq.sightly,version=[2.5,3) -- Cannot be resolved

If you are migrating to AEM 6.3/AEM 6.4 then you may face the below issue

com.adobe.cq.sightly,version=[2.5,3) -- Cannot be resolved

Solution:

Add correct uber-jar version in pom.xml
<dependency>
<groupId>com.adobe.aem</groupId> <artifactId>uber-jar</artifactId> <version>6.4.0</version> <classifier>apis</classifier> <scope>provided</scope> </dependency>

If still issue exists, then add below in import package
<Import-Package>com.adobe.cq.sightly;version=2.5.3,*</Import-Package>