The document outlines an Adobe developer event discussing the capabilities of Apache Sling, an open-source project, and its modular framework. It highlights the extensive features of Sling, including resource management, job distribution, and a query API, while emphasizing its stability and cloud compatibility. The presentation concludes by encouraging community participation in the development of Apache Sling.

1. CIRCUIT – An Adobe Developer Event
Presented by ICF Interactive
10 Things Apache
Sling Can Do...
The Secrets of an Open
Source Project

2. • RnD Adobe Research Switzerland
• Team Lead / Founder of Adobe
Granite
• Member of the Apache Software
Foundation
• VP of Apache Felix and Sling
• OSGi Core Platform and Enterprise
Expert Groups
• Member of the OSGi Board
• Book / article author, technical
reviewer, conference speaker
2
cziegele@adobe.com
@cziegeler

3. 3
0

4. History
• Code donation to Apache in 2007
• OSGi implementations
• Tooling
• Sling Framework
4

5. Statistics
• Nearly 40 committers
• Highly modular
• ~ 15 releases per month
• Platform for Adobe (AEM)
• Used by various companies
5

6. 6
1

7. Sustainable through Modularity
• Moduls from the start
• Very stable client API (+7 years)
• Extensions
• The Power of OSGi
7

8. 8
2

9. Everything is a Resource
9
/
content
products
misc
workflows
images
Resource
Provider
[Oak]
Resource
Provider
[DB]
Resource
Provider
[File]
Resource
Provider
[Mongo]

10. Resource API
• Simple to use
• Powerful through adapter pattern
• Full CRUD Support
• Queries
• Access Gateway
10

11. 11
3

12.
Cluster
99
Cluster
35
Build for the Cloud
12
Clustered
JCR
JCR
ID
:
A
ID
:
X
ID
:
42
ID
:
1
Single
Instance
Instance
1
Instance
2
Instance
3
Leader
Leader
Topology

13. 13
4

14. Sling Jobs
• Guaranteed processing,
• Exactly once (can be at most once)
• Load Balancing
14

15. Sling Job Distribution
15
Topology
Instance
Sling
ID:
1
Job
Manager
Instance
Sling
ID:
2
Job
Manager
Instance
Sling
ID:
3
Job
Manager
Job
Consumer
Topic:
A
Job
Consumer
Topic:
B

16. Sling Job Distribution
16
Instance
Sling
ID:
1
Job
Manager
Instance
Sling
ID:
2
Job
Manager
Instance
Sling
ID:
3
Job
Manager
A
Job
Consumer
Topic:
A
Job
Consumer
Topic:
B
A:2
Job
Topology

17. Sling Job Distribution
17
Instance
Sling
ID:
1
Job
Manager
Instance
Sling
ID:
2
Job
Manager
Instance
Sling
ID:
3
Job
Manager
B
Job
Consumer
Topic:
A
Job
Consumer
Topic:
B
B:3
Job
Topology

18. 18
5

19. Local Events
19
OSGi
Event
Admin
Component
A
publish
deliver
Component
X
Component
Y

20. Remote Events
20
OSGi
Event
Admin
Component
A
publish
deliver
Component
X
Component
Y
OSGi
Event
Admin

21. 21
6

22. Sightly – Beautiful Markup
• Lightweight
• Secure
• Code-less
• Powerful
• Intuitive
22

23. Sightly
<a href="${properties.link || '#'}"
title="${properties.jcr:title}">
${properties.jcr:description}
</a>
23

24. Separate Content and Code
24
<!-­‐-­‐/*template.html
*/-­‐-­‐>
<div
data-­‐sly-­‐use.nav="navigaon.js">${nav.foo}</div>
<!-­‐-­‐/*navigaon.js
*/-­‐-­‐>
use(funcon
()
{
return
{
foo:
"Hello
World"
};
});
Or
Java
(+
Sling
Models)

25. 25
7

26. Query API
26
{
Resource resource = ...;
while ((resource = resource.getParent()) != null) {
if (!resource.isResourceType("cq:Page")) {
continue;
}
Resource template = resource
.getChild("jcr:content/cq:template");
if (template != null
&& "my/template".equals(template.adaptTo(String.class))) {
break;
}
}
if (resource != null) {
// we've found appropriate ancestor
}
}

27. Query API
27
{
Resource resource = ...;
while ((resource = resource.getParent()) != null) {
if (!resource.isResourceType("cq:Page")) {
continue;
}
Resource template = resource
.getChild("jcr:content/cq:template");
if (template != null
&& "my/template".equals(template.adaptTo(String.class))) {
break;
}
}
if (resource != null) {
// we've found appropriate ancestor
}
}
import static org.apache.sling.query.SlingQuery.$;
//...
$(resource)
.closest("cq:Page[jcr:content/cq:template=my/template]")

28. 28
8

29. Provisioning Model
• Text based instance description
– Runtime (OSGi Framework, Sling Launchpad,
Properties)
– Features (Modules, Content, Configuration)
– Application (Modules, Content, Configuration)
• Supports run modes
29

30. Provisioning Model
30
[feature
name=quickstart]
[arfacts]
com.adobe.granite/com.adobe.granite.repository.checker/1.0.0
org.apache.sling/org.apache.sling.tenant/1.0.2
org.apache.sling/org.apache.sling.bundleresource.impl/2.2.0
com.adobe.granite/crx-­‐auth-­‐token/2.5.20
org.apache.sling/org.apache.sling.commons.compiler/2.2.0
org.apache.sling/org.apache.sling.commons.html/1.0.0
org.apache.sling/org.apache.sling.commons.mime/2.1.8
org.apache.sling/org.apache.sling.engine/2.4.0
[configuraons]
com.adobe.granite.auth.oauth.impl.helper.ProviderConfigManager
oauth.cookie.max.age="-­‐1"
oauth.cookie.login.meout="-­‐1“

31. Provisioning Model
• Various tooling possible
• New launchers
• Diff between two versions of the
application
• Only „deploy“ changed/new artifacts
31

32. 32
9

33. 1…2…3…test…..test
• Mocking of ResourceResolverFactory, ResourceResolver,
Resource, ….
• Embedding a JCR Repository
• Defer to Integration Tests
Apache Sling Testing Mocks

34. Resource Resolver Mock
ResourceResolverFactory factory =
new MockResourceResolverFactory();
ResourceResolver resolver = factory.getResourceResolver(null);
resolver.getResource("/my/path");
resource.adaptTo(ValueMap.class);
resolver.create(parent, "new resource", properties);
resolver.delete(resource);
resource.adaptTo(ModifiableValueMap.class);
resolver.commit();
resolver.revert();

35. Resource Resolver Mock
MockHelper.create(resolver)
.resource("/apps")
.resource("1").p("a", "1").p("b", "2")
.resource(".2")
.p(ResourceResolver.PROPERTY_RESOURCE_TYPE, "apps")
.resource(".3").p("e", "2")
.p(ResourceResolver.PROPERTY_RESOURCE_TYPE, "apps")
.resource("/libs")
.resource("1").p("d", "1").p("b", "5")
.resource(".2")
.p(ResourceResolver.PROPERTY_RESOURCE_TYPE, "apps")
.resource(".4").p("f", "2");

36. Sling Mocks for Everyone
• Logging
• OSGi
• Resource Resolver
• Sling
• JCR / Jackrabbit / Oak
36

37. 37
10

38. Sling IDE
• Eclipse based
• AEM extensions
• Fast round trips
– Content
– Bundles
38

39. 39
11

40. It‘s Open Source
• Everyone can participate!
40

41. 41
42

42. And now you J
Q&A
42

43. CIRCUIT – An Adobe Developer Event
Presented by ICF Interactive
10 Things You
can do for
Apache Sling...
The END
43