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Duke on CRaC
with Jakarta EE
Ivar Grimstad
Jakarta EE Developer Advocate
Rustam Mehmandarov
Senior Software Engineer
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https://github.com/ivargrimstad
https://www.linkedin.com/in/ivargrimstad
@[email protected]
ivargrimstad_of
fi
cial
@ivar_grimstad
https://www.threads.net/@ivargrimstad_of
fi
cial
@ivargrimstad.bsky.social
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https://github.com/mehmandarov
https://www.linkedin.com/in/mehmandarov
@[email protected]
@rmehmandarov
@rustam.no
https://rustam.no
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COPYRIGHT (C) 2022, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
COPYRIGHT (C) 2025, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
Jakarta EE
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2004 2024
1995 1999 2006 2017 2020
javax.* -> jakarta.*
2014
JSR 330
2009
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COPYRIGHT (C) 2025, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
Speci
fi
cation
Document
API
TCK
Final Speci
fi
cation
Compatible
Implementation(s)
Speci
fi
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No content
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No content
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COPYRIGHT (C) 2022, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
COPYRIGHT (C) 2025, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
Jakarta EE 11
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RESTful Web Services 4.0
JSON Processing 2.1
JSON Binding 3.0
Annotations 3.0
CDI Lite 4.1
Interceptors 2.2
Dependency Injection 2.0
Servlet 6.1
Pages 4.0
Expression Language 6.0
Debugging Support 2.0
Standard Tag Libraries 3.0
Faces 4.1
WebSocket 2.2
Enterprise Beans Lite 4.0
Persistence 3.2
Transactions 2.0
CDI 4.1
Authentication 3.1
Concurrency 3.1
Security 4.0
Validation 3.1
Data 1.0
Authorization 3.0
Activation 2.1
Batch 2.1
Connectors 2.1
Mail 2.1
Messaging 3.1
Enterprise Beans 4.0
Jakarta EE 11 Platform
Jakarta EE 11 Web Pro
fi
Updated
Not Updated
New
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Jakarta EE 11 Web Pro
fi
le
RESTful Web Services 4.0
JSON Processing 2.1
JSON Binding 3.0
Annotations 3.0
CDI Lite 4.1
Interceptors 2.2
Dependency Injection 2.0
Servlet 6.1
Pages 4.0
Expression Language 6.0
Debugging Support 2.0
Standard Tag Libraries 3.0
Faces 4.1
WebSocket 2.2
Enterprise Beans Lite 4.0
Persistence 3.2
Transactions 2.0
CDI 4.1
Authentication 3.1
Concurrency 3.1
Security 4.0
Validation 3.1
Data 1.0
Jakarta EE 11 Core Pro
fi
Updated
Not Updated
New
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Jakarta EE 11 Core Pro
fi
le
Updated
Not Updated
New
RESTful Web Services 4.0
JSON Processing 2.1
JSON Binding 3.0
Annotations 3.0
CDI Lite 4.1
Interceptors 2.2
Dependency Injection 2.0
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Jakarta EE 11
API source level: Java SE 17
API binary level: Java SE 17
TCK run with: Java SE 17+21
App Developers (YOU) can use Java SE 21 features if you like !!
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COPYRIGHT (C) 2025, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
Release Cadence
~6-9 Months after the latest LTS of Java
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COPYRIGHT (C) 2025, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
May, 2024
Milestone 4
• Feature complete
• All API jars released
• For each API at least one compatible
implementation (e.g. Hibernate, Mojarra)
• Each compatible implementation passed
standalone TCK
jakarta.platform
jakarta.jakartaee-api
11.0.0-M4
provided
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COPYRIGHT (C) 2025, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
Q4, 2024 (Core Pro
fi
le)
Q1, 2025 (Web Pro
fi
le)
Q2, 2025 (Platform)
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COPYRIGHT (C) 2022, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
COPYRIGHT (C) 2025, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
CRaC
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Running Application Running Application
Aware of checkpoint
being created
Aware of restore
happening
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Source: Gerrit Grunwald, Azul
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public interface Resource {
void beforeCheckpoint(Context extends Resource> context);
void afterRestore(Context extends Resource> context);
}
CRaC API
org.crac
crac
1.5.0
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JVM
Application
Resource Resource
beforeCheckpoint()
afterRestore()
beforeCheckpoint()
afterRestore()
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java -XX:CRaCCheckpointTo=PATH -jar app.jar
java -XX:CRaCRestoreFrom=PATH
START
RESTORE
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CRaC Engines
CRaC Engines
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Checkpoint Restore In Userspace
(CRIU)
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COPYRIGHT (C) 2025, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
Warp
-XX:CRaCEngine=warp
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COPYRIGHT (C) 2022, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
COPYRIGHT (C) 2025, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
Jakarta EE and CRaC
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COPYRIGHT (C) 2025, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
Jakarta Contexts and Dependency Injection 4.1
https://jakarta.ee/speci
fi
cations/cdi/4.1/
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COPYRIGHT (C) 2025, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
CDI Application Lifecycle Events
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private void init(@Observes
@Initialized(ApplicationScoped.class) Object init) {
// initialised
}
private void destroy(@Observes
@Destroyed(ApplicationScoped.class) Object init) {
// destroyed
}
@Observes @Initialized(ApplicationScoped.class)
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@ApplicationScoped
public class StartupListener implements Resource {
@Override
public void beforeCheckpoint(Context extends Resource> context) {
// before checkpoint
}
@Override
public void afterRestore(Context extends Resource> context) {
// after restore
}
}
org.crac
crac
1.5.0
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COPYRIGHT (C) 2025, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
Managed Resources
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JVM
Application
Resource Resource
beforeCheckpoint()
afterRestore()
beforeCheckpoint()
afterRestore()
Application Server External
Resources
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Demo
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Helidon
Quarkus
Average startup Time (ms)
0 0,65 1,3 1,95 2,6
1,234
1,379
1,332
2,409
No CRaC CRaC
kind
of not very scienti
fi
c
2.3 GHz
8-Core
Intel Core i9
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COPYRIGHT (C) 2022, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
Summary
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Authorization 3.0
Activation 2.1
Batch 2.1
Connectors 2.1
Mail 2.1
Messaging 3.1
Enterprise Beans 4.0
RESTful Web Services 4.0
JSON Processing 2.1
JSON Binding 3.0
Annotations 3.0
CDI Lite 4.1
Interceptors 2.2
Dependency Injection 2.0
Servlet 6.1
Pages 4.0
Expression Language 6.0
Debugging Support 2.0
Standard Tag Libraries 3.0
Faces 4.1
WebSocket 2.2
Enterprise Beans Lite 4.0
Persistence 3.2
Transactions 2.0
CDI 4.1
Authentication 3.1
Concurrency 3.1
Security 4.0
Validation 3.1
Jakarta EE 11 Platform
Updated
Not Updated
New
Data 1.0
Under Developm
ent
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COPYRIGHT (C) 2025, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
2022 2024
2020
Java 21
Embrace Records
Jakarta Data
CDI Centric
Removals and Deprecations
javax.* -> jakarta.* Jakarta EE Core Pro
fi
le
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COPYRIGHT (C) 2025, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
CRaC
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COPYRIGHT (C) 2025, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
Jakarta CRaC
An
Idea?
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Project Leyden
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Jakarta EE
https://jakarta.ee
Get Started
https://start.jakarta.ee
CRaC
http://openjdk.org/projects/crac
Demo Code
https://github.com/mehmandarov/randomstrings
https://rustam.no
https://jakarta.ee/community/developer-advocate