Contenu connexe
Similaire à Java EE 7 (Lyon JUG & Alpes JUG - March 2014)
Similaire à Java EE 7 (Lyon JUG & Alpes JUG - March 2014) (20)
Plus de David Delabassee (19)
Java EE 7 (Lyon JUG & Alpes JUG - March 2014)
- 1. What’s New in the Java EE Platform
Alpes JUG - March 2014
!
David Delabassee
@delabassee
Software Evangelist - Oracle
- 2. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!2
Program Agenda
A look at some of the important
new features of Java EE 7
- 3. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!3
Java EE 7 Momentum
ACTIVEPROJECTS
26
Active and
transparent
mailing lists
JSRsADOPTED
22
JUGs
19
Adopt a JSR
PROMOTEDBUILDS
89
GlassFish
YOU
187
COMPANIES
32
EXPERTS
SPECLEADS
16
ACTIVEJSRs
14
- 4. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!4
Java EE 7 Momentum
- 5. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!5
Java EE 7 Themes
ENTERPRISE
EDITION
▪ Batch
▪ Concurrency
▪ Simplified JMS
▪ More annotated POJOs
▪ Less boilerplate code
▪ Cohesive integrated
platform
DEVELOPER
PRODUCTIVITY
▪ WebSockets
▪ JSON
▪ Servlet 3.1 NIO
▪ REST
MEETING
ENTERPRISE
DEMANDS
Java EE 7
- 6. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.
Java EE 7 JSRs
New or Updated
▪ JPA 2.1
▪ JAX-RS 2.0
▪ EJB 3.2
▪ JMS 2.0
▪ Servlet 3.1
▪ EL 3.0
▪ JSF 2.2
▪ CDI 1.1
▪ Bean Validation 1.1
▪ WebSocket 1.0
▪ JSON 1.0
▪ Batch Applications 1.0
▪ Concurrency Utilities 1.0
!6
- 7. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.
Java EE 7 Maintenance Releases
▪ Common Annotations 1.2
▪ JTA 1.2
▪ Interceptors 1.2
▪ Connector 1.7
▪ JSP 2.3
▪ JASPIC 1.2
▪ JACC 1.4
▪ JavaMail 1.5
▪ Web Services 1.4
!7
- 8. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!8
JSON Processing 1.0
▪ API to parse and generate JSON
▪ Streaming API (javax.json.stream)
– Low-level, efficient way to parse/generate JSON
– Similar to StAX API in XML world
▪ Object model API (javax.json)
– Simple, easy to use high-level API
– Similar to DOM API in XML world
- 9. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!9
JSON Processing 1.0
▪ Created using
– Json.createParser(…)!
– Json.createParserFactory().createParser(…)!
▪ Parses JSON in streaming way from input sources
Event event = parser.next(); // START_OBJECT!
event = parser.next(); // KEY_NAME!
event = parser.next(); // VALUE_STRING!
▪ Parser state events
– START_OBJECT, END_OBJECT, START_ARRAY, END_ARRAY,
KEY_NAME, VALUE_STRING, VALUE_NUMBER, …
Streaming API: Parsing
- 10. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!10
JSON Processing 1.0
{!
“firstName”:“John”,“lastName”: “Smith”,“age”: 25,!
“phoneNumber”: [!
{“type”: “home”, “number”: “212 555-1234” },!
{“type”: “fax”, “number”: “646 555-4567” }!
]!
}
Streaming Parser
- 11. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!11
JSON Processing 1.0
{!
“firstName”:“John”,“lastName”: “Smith”,“age”: 25,!
“phoneNumber”: [!
{“type”: “home”, “number”: “212 555-1234” },!
{“type”: “fax”, “number”: “646 555-4567” }!
]!
}
Streaming Parser
START_OBJECT
- 12. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!12
JSON Processing 1.0
{!
“firstName”:“John”,“lastName”: “Smith”,“age”: 25,!
“phoneNumber”: [!
{“type”: “home”, “number”: “212 555-1234” },!
{“type”: “fax”, “number”: “646 555-4567” }!
]!
}
Streaming Parser
KEY_NAME
- 13. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!13
JSON Processing 1.0
{!
“firstName”:“John”,“lastName”: “Smith”,“age”: 25,!
“phoneNumber”: [!
{“type”: “home”, “number”: “212 555-1234” },!
{“type”: “fax”, “number”: “646 555-4567” }!
]!
}
Streaming Parser
VALUE_STRING
- 14. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!14
JSON Processing 1.0
{!
“firstName”:“John”,“lastName”: “Smith”,“age”: 25,!
“phoneNumber”: [!
{“type”: “home”, “number”: “212 555-1234” },!
{“type”: “fax”, “number”: “646 555-4567” }!
]!
}
Streaming Parser
VALUE_NUMBER
- 15. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!15
JSON Processing 1.0
{!
“firstName”:“John”,“lastName”: “Smith”,“age”: 25,!
“phoneNumber”: [!
{“type”: “home”, “number”: “212 555-1234” },!
{“type”: “fax”, “number”: “646 555-4567” }!
]!
}
Streaming Parser
START_ARRAY
- 16. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!16
JSON Processing 1.0
{!
“firstName”:“John”,“lastName”: “Smith”,“age”: 25,!
“phoneNumber”: [!
{“type”: “home”, “number”: “212 555-1234” },!
{“type”: “fax”, “number”: “646 555-4567” }!
]!
}
Streaming Parser
END_ARRAY
- 17. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.
JSON Processing 1.0
JsonGenerator gen = Json.createGenerator…!
.writeStartObject()!
.write("firstName", "John") !
.write("lastName", "Smith") !
.write("age", 25) !
.writeStartArray(“phones”)!
.writeStartObject()!
!! .write(“type",“home") !
.write(“number”, “222…”)!
.writeEnd()!
.writeStartObject() …!
.writeEnd()!
.writeEnd()!
.writeEnd();!
!
Using Streaming API to generate JSON
!
{ “firstName”:“John”,!
“lastName”:”Smith”,!
“age”:25, !
“phones”:[ !
{“type”:“home”,“number”:“…”},!
{“type”:“fax”,“number”:“…”} ]!
}
!17
- 18. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!18
Interactive Web Sites
• Flavors of Server Push
• Polling
• Long polling
• AJAX
!
!
• Complex, inefficient, wasteful
- 19. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!19
WebSockets to the rescue
▪ Bidirectional full-duplex messaging
– Over a single TCP connection
▪ IETF defined protocol: RFC 6455
▪ Part of HTML5
▪ W3C defined JavaScript API
▪ Adoption
▪ http://caniuse.com/websockets
Bring interactivity to the Web
- 20. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!20
WebSockets
Handshake Request
Http Request!
GET /mychat HTTP/1.1!
Host: server.example.com!
Upgrade: websocket!
Connection: Upgrade!
Sec-WebSocket-Key: x3JJHMbDL1EzLkh9GBhXDw==!
Sec-WebSocket-Protocol: megachat, chat!
Sec-WebSocket-Extensions : compress, mux!
Sec-WebSocket-Version: 13!
Origin: http://example.com
- 21. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!21
WebSockets
Handshake Response
Http Response!
HTTP/1.1 101 Switching Protocols!
Upgrade: websocket!
Connection: Upgrade!
Sec-WebSocket-Accept: HSmrc0sMlYUkAGmm5OPpG2HaGWk=!
Sec-WebSocket-Protocol: chat!
Sec-WebSocket-Extensions: compress, mux
- 22. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!22
Java API for WebSocket 1.0
▪ WebSocket Java client & server API
▪ Part of Java EE 7
▪ Annotation-based & interface-based programming model
▪ Under consideration for Java SE 9
▪ Reference Implementation
▪ http://tyrus.java.net
▪ Supported in GlassFish 4.0
JSR 356
- 23. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!23
Java API for WebSocket 1.0
▪ Establish a WebSocket connection
▪ Send messages backwards and forwards
▪ End the connection
What’s the basic idea?
- 24. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!24
Java API for WebSocket 1.0
▪ Session
– Represents the active conversation
▪ Endpoint
– Intercepts websocket lifecycle events
▪ RemoteEndpoint
– Represents the other end of the conversation
▪ MessageHandler
– Handles incoming messages for endpoint
Main API classes
- 25. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!25
WebSocket Endpoints
public class MyClient extends Endpoint {!
public void onOpen(Session session, EndpointConfig ec) {!
session.addMessageHandler(new MessageHandler.Whole<String>() {!
public void onMessage(String payload) {!
System.out.println("From the server : " + payload);!
}!
}!
session.getBasicRemote().sendText("Hello!");!
}!
!
public void onClose(Session session, CloseReason closeReason) {!
super.onClose(session, closeReason);!
}!
}
Programmatic API
- 26. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!26
WebSocket Endpoints as POJOs
@ClientEndpoint!
public class MyClient { !
@OnOpen!
public void onOpen(Session session) {!
session.getBasicRemote().sendText(“Hello”);!
}!
@OnMessage!
public void onMessage(String payload, Session session) { !
System.out.println("From the server : " + payload);!
} !
}
Annotated client endpoint
- 27. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!27
WebSocket Endpoints as POJOs
@ServerEndpoint(“/chat")!
public class ChatServer { !!
static Set<Session> peers = Collections.synchronizedSet(…);!!!
! ! ! @OnOpen!
!!! public void onOpen(Session peer) {!
peers.add(peer);!
}!
!
@OnMessage!
!!! public void onMessage (String message, Session client) { !
for (Session peer : peers) {!
peer.getBasicRemote().sendObject(message);!
} !
}!
!
@OnClose!
!!! public void onClose(Session peer) {!
peers.remove(peer);!
}!
}
Annotated server endpoint
- 28. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!28
Java API for WebSocket 1.0
▪ Payload
▪ Text
▪ Binary
▪ Ping-Pong
▪ Synchronous / Asynchronous
▪ Whole message / Sequence of partial messages
▪ No delivery guarantee
Messaging
- 29. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!29
Java API for WebSocket 1.0
▪ Use Session’s RemoteEndpoint interface
mySession.getBasicRemote().sendText(”Hello”);
!
▪ Return a value from @OnMessage method
@OnMessage!
public String echo(String incomingMessage) {!
return(“Hello”);!
}
Sending messages
- 30. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!30
Java API for WebSocket 1.0
Means of sending RemoteEndpoint method to use
as whole string sendText(String message)
as binary data sendBinary(ByteBuffer message)
in string fragments sendText(String part, boolean last)
in binary data fragments sendBinary(ByteBuffer part, boolean last)
as a blocking stream of text Writer getSendWriter())
as a blocking stream of binary data OutputStream getSendStream()
as a custom object of type T sendObject(T customObject)
- 31. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!31
Java API for WebSocket 1.0
▪ Annotation - @onMessage
@OnMessage!
public void whenGettingText(String message)…!
!
▪ Implement a MessageHandler, add it to the Session
MyMessageHandler implements MessageHandler.Whole<String>!
…!
session.addMessageHandler( new MyMessageHandler() );
Receiving messages
- 32. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!32
Java API for WebSocket 1.0
▪ Encoder
▪ Object to Binary: Encoder.Binary<T>, Encoder.BinaryStream<T>!
▪ Object to Text: Encoder.Text<T>, Encoder.TextStream<T>!
▪ Decoder
▪ Text to Object: Decoder.Text<T>, Decoder.TextStream<T>!
▪ Binary to Object: Decoder.Binary<T>, Decoder.BinaryStream<T>!
▪ Lifecycle
▪ init() and destroy() methods
▪ willDecode()
Custom payload
- 33. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!33
Java API for RESTful Web Services (JAX-RS) 2.0
▪ Client API
▪ Filters and Interceptors
▪ Asynchronous Processing
▪ Hypermedia
▪ Validation
- 34. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!34
JAX-RS 1.1
URL url = new URL("http://. . ./atm/balance"); !
HttpURLConnection conn = (HttpURLConnection) url.openConnection();!
conn.setDoInput(true); !
conn.setDoOutput(false); !
conn.setRequestMethod("GET"); !
BufferedReader br = new BufferedReader(new!
!!! ! ! ! ! ! ! ! ! InputStreamReader(conn.getInputStream())); !
String line; !
while ((line = br.readLine()) != null) { !
//. . . !
}
Previous Client API
- 35. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!35
JAX-RS 2.0
Client client = ClientFactory.newClient();!
!
String name = client.target("http://.../orders/{orderId}/customer")!
.resolveTemplate(“orderId”, “10”)!
.request()!
.get(String.class);
JAX-RS 2.0 Client API
- 36. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!36
Client client = ClientFactory.newClient();!
…!
WebTarget target = client.target(“http://…/orders/{orderId}/customer”)!
! ! .register(LoggingFilter.class);!
!
String name = target.resolveTemplate(“orderId”, “10”)!
!! !! ! ! ! .request()!
!! !! ! ! ! .get(String.class);
JAX-RS 2.0
JAX-RS 2.0 Client API
- 37. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!37
JAX-RS 2.0
@Path("/")!
class MyResourceClass {!
!
@POST!
@Consumes(MediaType.APPLICATION_FORM_URLENCODED)!
public void registerUser(!
@NotNull @FormParam("firstName") String firstName,!
@NotNull @FormParam("lastName") String lastName,!
@Email @FormParam("email") String email) {!
... }!
…!
}
Bean Validation
- 38. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!38
Servlet 3.1
▪ Protocol Upgrade
▪ Non-blocking I/O
▪ Miscellaneous
▪ Security
▪ Upload
▪ …
JSR 340
- 39. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!39
Alignment and Simplification of Managed Beans
▪ CDI is core component model
▪ CDI enabled by default
▪ Expanded use of CDI Interceptors
– Transactional interceptors
– Method-level validation interceptors
▪ New CDI scopes: @TransactionScoped, @FlowScoped
Cohesive, integrated model
Java EE 7
- 40. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!40
Managed Bean Alignment
▪ CDI injection and CDI interceptors apply to all Java EE components
and related managed classes when CDI is enabled
▪ CDI is enabled by default in implicit bean archives
– Use of CDI bean-defining annotations (@SessionScoped,
@Dependent,…) and session beans result in implicit bean archives
▪ Library jars, EJB jars, WEB-INF/classes
– beans.xml not required
Expanded use of CDI
- 41. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!41
Transactional Interceptors
@Transactional(rollbackOn={SQLException.class},!
dontRollbackOn={SQLWarning.class})!
public class ShoppingCart {…}!
…!
!
@Inherited!
@InterceptorBinding!
@Target({TYPE, METHOD}) @Retention(RUNTIME)!
public @interface Transactional {!
TxType value() default TxType.REQUIRED;!
Class[] rollbackOn() default {};!
Class[] dontRollbackOn() default {};!
}
Annotations and semantics defined in JTA 1.2
- 42. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!42
Bean Validation 1.1
Method-level Validation
@Stateless!
public class OrderService {!
…!
@ValidOrder!
public Order placeOrder(!
@NotNull String productName,!
@Max(10) int quantity,!
@NotNull String customerName,!
@Address String customerAddress) {!
…!
}!
}
Via CDI Interceptors
- 43. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!43
Interceptor Ordering
▪ Interceptor.Priority.PLATFORM_BEFORE = 0
– Platform-defined interceptors to be executed at beginning of interceptor chain
– Transactional interceptors: Interceptor.Priority.PLATFORM_BEFORE+200
▪ Interceptor.Priority.LIBRARY_BEFORE = 1000
– Intended for use by extension libraries
▪ Interceptor.Priority.APPLICATION = 2000
– Intended for application-defined interceptors
▪ Interceptor.Priority.LIBRARY_AFTER = 3000
▪ Interceptor.Priority.PLATFORM_AFTER = 4000
– Bean Validation defined interceptors: Interceptor.Priority.PLATFORM_AFTER+800
Well-defined priority ordering
- 44. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!44
Resource Definition Metadata
▪ Specifies resources needed by application
– Enhances configurability in Java EE 7 apps
– Facilitates provisioning in cloud environments
– Java EE 6 introduced DataSourceDefinition
!
@DataSourceDefinition (!
name=“java:app/jdbc/myDB”,!
className=“oracle.jdbc.pool.OracleDataSource”,!
isolationLevel=TRANSACTION_REPEATABLE_READ, initialPoolSize=5)!
!
@Stateless public class MySessionBean {!
@Resource(lookup=“java:app/jdbc/myDB”) DataSource my DB;!
…!
}
- 45. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!45
Resource Definition Metadata
▪ Java EE 7 adds:
– JMSConnectionFactoryDefinition!
– JMSDestinationDefinition!
– MailSessionDefinition!
– ConnectionFactoryDefinition!
– AdministeredObjectDefinition
- 46. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!46
Default Resources
▪ JDBC/JPA
– java:comp/DefaultDataSource!
▪ JMS
– java:comp/DefaultJMSConnectionFactory!
▪ Concurrency Utilities
– java:comp/DefaultManagedExecutorService!
– java:comp/DefaultManagedScheduledExecutorService!
– java:comp/DefaultManagedThreadFactory!
– java:comp/DefaultManagedContextService
Preconfigured resources for use by application
- 47. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!47
Simplification through Pruning
▪ Process defined in Java EE 6
– Platform version N defines feature as “Proposed Optional”
– Platform version N+1 determines whether to make feature Optional
▪ Optional APIs as of Java EE 7
– EJB Entity Beans (CMP, BMP, EJB QL)
– JAX-RPC
– JAXR
– Deployment (JSR 88)
- 48. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!48
Java Message Service 2.0
▪ Less code, less boilerplate
▪ Fewer objects to manage
▪ Increased developer productivity
▪ “Classic API” has also been improved
New JMS Simplified API targeted at ease of development
- 49. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!49
JMS 2.0
▪ New JMSContext interface
▪ Use of CDI injection; new TransactionScope
▪ AutoCloseable JMSContext, Connection, Session, …
▪ Use of runtime exceptions
▪ Method chaining on JMSProducer
▪ Simplified message sending
Simplifications include….
- 50. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!50
JMS 1.1
@Resource(lookup = “java:global/jms/myConnectionFactory”)!
ConnectionFactory connectionFactory; !
!
@Resource(lookup = “java:global/jms/myQueue”)!
Queue queue; !
!
public void sendMessage(String text) { !
try {!
Connection connection = connectionFactory.createConnection();!
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);!
MessageProducer messageProducer = session.createProducer(queue);!
TextMessage textMessage = session.createTextMessage(text);!
messageProducer.send(textMessage);!
} finally {!
connection.close();!
} catch (JMSException ex) { … }!
}!
Sending a message in the JMS 1.1 “classic” API
- 51. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!51
JMS 2.0
@Resource(lookup = “java:global/jms/myConnectionFactory”)!
ConnectionFactory connectionFactory; !
!
@Resource(lookup = “java:global/jms/myQueue”)!
Queue queue; !
!
public void sendMessage(String text) { !
try (JMSContext context = connectionFactory.createContext();) {!
context.createProducer().send(queue, text);!
} catch (JMSRuntimeException ex) {!
…!
}!
}
Sending a message using Simplified API and JMSContext
- 52. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!52
JMS 2.0
@Inject !
@JMSConnectionFactory(“java:global/jms/myConnectionFactory”)!
JMSContext context;!
!
@Resource(lookup = “java:global/jms/myQueue”)!
Queue queue; !
!
public void sendMessage(String text) { !
context.createProducer().send(queue, text);!
}
Even simpler….
- 53. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!53
JMS 2.0
@Inject !
JMSContext context;!
!
@Resource(lookup = “java:global/jms/myQueue”)!
Queue queue; !
!
public void sendMessage(String text) { !
context.createProducer().send(queue, text);!
}
Even simpler still….
- 54. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!54
Concurrency Utilities for Java EE 1.0
▪ Extension of Java SE Concurrency Utilities API
▪ Provides managed objects for submitting tasks and obtaining
managed threads
– ManagedExecutorService!
– ManagedScheduledExecutorService!
– ManagedThreadFactory!
– ContextService
Provides asynchronous capabilities to Java EE components
- 55. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!55
Concurrency Utilities for Java EE 1.0
public class AccountTask implements Callable {!
...!
public AccountInfo call() {!
// task logic!
}!
...!
}!
!
//in calling component:!
@Resource!
ManagedExecutorService mes;!
...!
Future<AccountInfo> acctFuture = mes.submit(new AccountTask(...));!
AccountInfo accountInfo = acctFuture.get(); // Wait for the results.!
...!
// Process the results!
...
- 56. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!56
Batch Applications for the Java Platform 1.0
▪ Designed for non-interactive, bulk-oriented and long-running tasks
▪ Sequential, parallel, and/or decision-based batch execution
▪ Processing styles
– Item-oriented (“chunked”)
– Task-oriented (“batchlet”)
- 57. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!57
Batch 1.0
▪ Job : Entire batch process
– Defined through XML Job Specification Language
▪ Step : Independent, sequential phase of a job
▪ JobOperator : Interface for managing job processing
▪ JobRepository : Information about past and present jobs
Key concepts
Job Repository
Job Operator Job Step
ItemReader
ItemWriter
ItemProcessor
- 58. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!58
Batch 1.0
▪ Chunked : Item-oriented processing
– ItemReader/ItemProcessor/ItemWriter pattern
– Configurable checkpointing and transactions
▪ Batchlet : Task-oriented processing
– Roll-your-own batch pattern
– Runs to completion and exits
▪ Job can include both types of steps
Job steps
- 59. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!59
Batch Applications
▪ Read and Process one item
▪ Do the above ‘n’ times (‘commit interval’)
▪ Write the ‘n’ processed items
▪ Commit the transaction
Primary Processing Style
- 60. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!60
Batch 1.0
<job id="myJob" xmlns="http://xmlns.jcp.org/xml/ns/javaee" version="1.0">!
<step id="step1" next="step2">!
<chunk item-count="3">!
<reader ref="myItemReader"></reader> !
<processor ref="myItemProcessor"></processor>!
<writer ref="myItemWriter"></writer> !
</chunk>!!
</step>!
<step id="step2" next=“step3”>!
<batchlet ref="myBatchlet"/>!
</step>!
<step id="step3" >!
<chunk item-count="3">!
<reader ref="myOtherItemReader"></reader> !
<processor ref="myOtherItemProcessor"></processor>!
<writer ref="myOtherItemWriter"></writer> !
</chunk>!!
</step>!
</job>
Job specification language
- 61. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!61
Batch 1.0
<step id=”sendStatements”>!
<chunk item-count=“3”>
<reader ref=”accountReader”/>!
<processor ref=”accountProcessor”/>
<writer ref=”myWriter”/>!
</step>
…implements ItemReader {
public Object readItem() {
// read account using JPA
}
…implements ItemProcessor {!
Public Object processItems(Object account) {
// read Account, return Statement!
}!
…implements ItemWriter {!
public void writeItems(List accounts) {
// use JavaMail to send email or save on disk!
}!
- 62. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!62
Batch 1.0
<step id=”transferFile”>!
<batchlet ref=“MyFileTransfer” />!
</step>
@Dependent!
@Named("MyFileTransfer")!
public class MyBatchlet implements javax.batch.api.chunk.Batchlet {!
@Inject!
private JobContext jobCtx;!!
@Override!
public void process() throws Exception {!
String fName = jobCtx.getProperties().getProperty("out_file");!
// transfer file!
}!
}!
- 63. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!63
Batch 1.0
Interface Abstract Classes
JobListener AbstractJobListener
StepListener AbstractStepListener
ChunkListener AbstractChunkListener
ItemRead/Write/ProcessListener AbstractItemRead/Write/ProcessListener
SkipRead/Write/ProcessListener AbstractSkipRead/Write/ProcessListener
RetryRead/Write/ProcessListener AbstractRetryRead/Write/ProcessListener
Listeners
- 64. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!64
Batch 1.0
JobOperator
private long startNewBatchJob() throws Exception { !
! ! JobOperator jobOperator = BatchRuntime.getJobOperator(); !
! ! Properties props = new Properties(); !
! ! props.setProperty(”someInputFileName", someInputFileName); !
! ! return jobOperator.start(JOB_NAME, props); !
}
- 65. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!65
And more…
▪ Servlet 3.1
▪ JPA 2.1
▪ JSF 2.2
▪ EJB 3.2
▪ EL 3.0
▪ JCA 1.7
▪ …
- 66. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!66
Java EE 7 Summary
ENTERPRISE
EDITION
▪ Batch
▪ Concurrency
▪ Simplified JMS
▪ More annotated POJOs
▪ Less boilerplate code
▪ Cohesive integrated
platform
DEVELOPER
PRODUCTIVITY
▪ WebSockets
▪ JSON
▪ Servlet 3.1 NIO
▪ REST
MEETING
ENTERPRISE
DEMANDS
Java EE 7
- 67. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!67
Transparency in JSR processes
▪ java.net used for all Oracle-led JSRs
– http://java.net/projects/javaee-spec/pages/Home
▪ Publicly viewable Expert Group mailing archives
▪ Users observer lists get copies of all Expert Group emails
▪ Public download areas, JIRAs
▪ Wikis, source repositories, etc. at the group discretion
▪ Commitment to JCP 2.8/2.9 processes
All Java EE JSRs run with high level of transparency
- 68. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!68
DOWNLOAD
Java EE 7 SDK
oracle.com/javaee
!
GlassFish 4.0
Full Platform or Web Profile
glassfish.org
- 69. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!69
WebLogic Server 12.1.3
WebLogic Server
12.1.3
Clients
HTML5
clients
ADF Mobile
Proxies
HTTP/S, JSON/XML
WebSocket, Server-Sent
Events, Long polling
OTD
Apache
OHS
Web Sockets (JSR 356)
TopLink Data Services
Server-Sent Events
JAX-RS 2.0
Avatar (post-GA)
HTML5client
emulation
JPA
Change
Notification
Database
• Server-Sent Events
• JAX-RS 2.0
• WebSocket – JSR 356
• JPA 2.1, JSON-P
• WebSocket Client Emulation
• Avatar
• Maven improvements
• Classloader Analysis Tool
updates
- 70. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!70
Program Agenda
Java EE 8 and beyond
- 71. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!71
Java EE 8
▪ New JSRs
▪ JCACHE (JSR 107)
▪ Data Grid API (JSR 347)
▪ State Management API (JSR 350)
▪ Identity API (JSR 351)
▪ Java API for JSON Binding
▪ Java EE Configuration
▪ …
▪ Profiles & Pruning
Ideas… just ideas!
- 72. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!72
Java EE 8
▪ HTML 5
▪ Server-sent events?
▪ JavaScript on the server?
▪ Something else?
▪ User Interface
▪ MVC?
▪ Client API for TSA?
▪ Templating? Facelet?
Ideas (cont.)
- 73. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!73
Java EE 8
▪ CDI
▪ NoSQL ?
▪ Cloud
▪ PaaS, SaaS, Multi-tenancy ?
▪ Logging
▪ Security
▪ Testability
▪ Deployment, Management, Monitoring
▪ ???
Ideas (cont.)
- 74. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!74
https://glassfish.org/survey
Java EE 8 Survey
- 76. Copyright © 2012, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2013, Oracle and/or its affiliates. All rights reserved. Insert Information Protection Policy Classification from Slide 12!76
Graphic Section Divider