Overview of the Java EE Next announcement made during JavaOne 2016 Presented at the BeJUG J1 Afterglow (Oct. 2016)

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Java EE Next
BeJUG JavaOne A,erglow
Oct. 2016
David Delabassee
@delabassee
Java EE and Cloud ApplicaGon FoundaGon

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Safe Harbor Statement
The following is intended to outline our general product direcGon. It is intended for
informaGon purposes only, and may not be incorporated into any contract. It is not a
commitment to deliver any material, code, or funcGonality, and should not be relied upon
in making purchasing decisions. The development, release, and Gming of any features or
funcGonality described for Oracle’s products remains at the sole discreGon of Oracle.
2

3. Copyright © 2016, Oracle and/or its affiliates. All rights reserved. | ConfidenGal – Oracle Internal/Restricted/Highly Restricted 3
The reports of my death
are greatly exaggerated
Java EE
“

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Java EE - Available On Premise and in the Cloud
13/10/16 4
Cloud
On Premise
WebSphere
WebLogic
Red Hat JBoss
4
Choice of
Implementa@ons

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Java EE APIs - Backbone of Leading Open Source Projects
5
Java EE
Containers
Microservices Web
Containers
Web
Frameworks
PaaS REST

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Java EE – What’s Next?
6
New AppDev Style
for Cloud and Microservices

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Developers Facing New Challenges
• More demanding business requirements
• Move to the Cloud for agility & flexibility
• Shie from physical infrastructure to virtual
• Microservices vs. monolithic applicaGons
• RunGme packaged with applicaGons

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Proposed Enhancements for Java EE
• New AppDev style for Cloud and Microservices
• Comprehensive
– Programming Model, Packaging, Portability, Monitoring…
• Build on proven technologies
• Standards-based
– JCP
– Only a proposal!
8

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Technical Areas of Focus
ConfidenGal – Oracle Internal/Restricted/Highly Restricted 9

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Designed for Agility and Scalability with Security
• Programming model
– Extend for reacGve programming
– Unified event model
– JAX-RS, HTTP/2, Lambda, JSON-B, …
• Eventual consistency
– AutomaGcally event out changes to observed data structures
• Key value/document store
– Persistence and query interface for Key Value and Document DB
• Security
– Secret management
– OAuth/OpenID support
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LocaGon Transparency and Resiliency
• ConfiguraGon
– Separate service packaging and configuraGon
– API for external configuraGon
• State
– API for external state
• Resiliency
– Circuit breakers
– Standardized health reporGng
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Reliability, Monitoring
Container Management
Scheduling & ElasGc Scaling
Key Value
Database
Logging
Config
State
Security
NoGficaGon
User profile
service
Order
service
Catalog
service

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Packaging for Simplicity
• Packaging – Docker model
– Package applicaGons, runGmes into containers
– Standalone immutable executable binary
– MulG-arGfact archives, leveraging Java 9
• Serverless
– Ephemeral instanGaGon
• MulGtenancy
– Increased density
– Tenant-aware rouGng and deployment
12
App
Server
Order
service
App
Server
Catalog
service
App
Server
User profile
service

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Proposal for Circuit Breaker – Resiliency
13
§ Extension to JSR 339 - JAX-RS Client
§ Several possible approaches:
§ ProgrammaGc – change in JAX-RS Client API
§ DeclaraGve – registering @Provider classes to the Client
§ Other…
§ Configurable -- potenGal parameters might include:
§ Sampling frequency
§ Sampling Gme period
§ Performance threshold (milliseconds)
§ % error threshold
§ …
§ Prevent request-handling threads
from being consumed while
making requests to remote
systems
§ Ease up on requests to remote
system as it's having problems
§ Allow system Gme to recover
§ Prevent cascading failures. Isolates
failures in the source system
§ Use circuit breaker without wriGng
extensive boiler-plate code
Problem Statements Proposal

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Proposal for Circuit Breaker – Resiliency
14
@Cache(timeToLive = 15, timeToLiveUnit = TimeUnit.SECONDS)
@CircuitBreaker(timeout = 5, timeoutUnit = TimeUnit.SECONDS)
@Bulkhead(numConcurrentRequests = 10, queueSize = 5)
@Retry(onException = IOException.class, maxRetries = 1)
public <K, V> V aBusinessMethod(K k) throws IOException {
// invoke remote business service
...
}
@Fallback(applyTo = {"aBusinessMethod"})
public <K,V> V someFallback() {
// perform fallback logic
...
}

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Proposal for Health Checking – Resiliency
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§ Define standard for how individual instances should report
health
§ Define configurable context path – e.g. /healthcheck
§ Define semanGcs for reporGng health
§ JSON response when /healthcheck is called
§ Return standardized statuses, bubble up errors, from
dependencies, etc
§ Circuit breaker could poll /healthcheck rather than waiGng
for HTTP requests to fail first
§ No standard for health is being
reported
§ ApplicaGons, resources, servers,
services, micro-services, etc. will
report health differently
§ TradiGonal health check just returns
opaque up/down messages
Problem Statements Proposal

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Proposal for Security
16
§ OpenID support for authenGcaGon
§ Improved OAuth support
§ RegistraGon and Discovery of Resources to
Request Scopes
§ AuthorizaGon Model
§ Standard way of connecGng an applicaGon to a key
service
§ EncrypGon service for stored data
§ Oauth & OpenID hard to use
OAuth
§ No standard way of connecGng an
applicaGon to a key service
§ Need to keep sensiGve stored data
secret
Problem Statements Proposal

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Proposal for ConfiguraGon
17
§ Separate runGme configuraGon from runGme plauorm
§ K/V
§ Define configuraGon persistence mechanisms, formats
and bindings
§ E.g. JSON, XML
§ Support of mulGple configuraGon sources
§ Layering and overrides
§ No standard way of working with
configuraGon in applicaGons
§ Many configuraGon schemes
don’t support layering, overrides,
concept of environments,
mulGple levels of visibility, etc
§ Many just use environment
variables, which is not scalable
§ Make it possible to deploy applicaGon
configuraGon without redeploying app
§ Externalized configuraGon is the
standard for cloud
Problem Statements Proposal

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Proposal for ConfiguraGon
18
Config config = CongifProvider.getConfig();
String foo = config.getProperty("foo");
String fooBar = config.getProperty("foo.bar");
// return null
String notExists = config.getProperty("not.exists");
// return "default"
String notExistsDefault = config.getProperty("not.exists","default");
Long fooBarBaz = config.getProperty("foo.bar.baz", Long.class);
foo=JavaOne!
foo.bar=9!
foo.bar.baz=2016!

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Proposal for ConfiguraGon
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// Single file source with default ordinal (200)
java –jar my.jar –Dconfig.source=/conf/myconfig.properties
// Two sources. Ordinals are 200 and 199
java –jar my.jar –Dconfig.source=http://shared/global.xml,/conf/my.json
Config config = ConfigProvider.builder()
.addSource(new EnvSource(), 300)
.addSource(new FileSource("/cfg/config.properties"), 200)
.addSource(new WebSource("http://shared/config.json"), 100)
.addSource(new MyCustomSource())
.build();

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Recent Java EE 7 compa@bility updates: Congratula@ons! Technical Focus Areas Summary
§ Extend for reacGve
programming
§ Unified event model
§ Event messaging API
§ JAX-RS, HTTP/2,
Lambda, JSON-B, ...
Programming Model
§ API to store
externalized state
State
§ AutomaGcally event out
changes to observed
data structures
Eventual Consistency
§ Extension to support
client-side circuit
breakers
§ Resilient commands
§ Standardize on client-
side format for
reporGng health
Resiliency
§ New spec – interfaces,
packaging format,
manifest
§ Ephemeral
instanGaGon
Serverless
§ Secret management
§ OAuth
§ OpenID
Security § Package applicaGons,
runGmes into services
§ Standalone immutable
executable binary
§ MulG-arGfact archives
Packaging
§ Increased density
§ Tenant-aware rouGng
and deployment
Mul@tenancy
§ Externalize
configuraGon
§ Unified API for
accessing configuraGon
Configura@on
§ Persistence and query
interface for key value
and document DB
Key Value/Doc Store
20

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Engage Java EE Community
• Feedback through Survey
• Launch Java EE Next JSRs
2016
Java EE 8
• Specs, RI, TCK complete
• IniGal microservices support
• Define Java EE 9
• Early access implementaGon
of Java EE 9
Java EE 9
• Specs, RI, TCK complete
• Modular Java EE runGme
• Enhanced microservices
support
Java EE Roadmap
2017
2018

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Java EE 7
22
Connector JAXB JSP Debugging
Managed Beans JSP Concurrency EE Interceptors JAX-WS WebSocket
Bean ValidaGon JASPIC Servlet JMS JTA Deployment
Batch JACC
Dependency
InjecGon JAXR JSTL Management
CDI EJB JAX-RPC Web Services JSF JPA
JSON-P
Common
AnnotaGons EL JAX-RS
Web Services
Metadata JavaMail

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Java EE 8
23
Connector JAXB JSP Debugging
Managed Beans JSP Concurrency EE Interceptors JAX-WS WebSocket
Bean ValidaGon JASPIC Servlet JMS JTA Deployment
Batch JACC
Dependency
InjecGon JAXR JSTL Management
CDI EJB JAX-RPC Web Services JSF JPA
Common
AnnotaGons EL JAX-RS
Web Services
Metadata JavaMail
CDI
JSON-B Security
Bean ValidaGon
JSF
JAX-RS JSON-P
Servlet
Health Check ConfiguraGon
JSP

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Java EE Next - Summary
• New AppDev Style for Cloud and Microservices
• Planning in process
• Only a proposal!
– hvp://glassfish.org/survey
• Contribute
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hvp://glassfish.org/survey
25