Agile Java

GenericJackson2JsonRedisSerializer Configuration - Spring Boot Example

noreply@blogger.com (Blogger) — Thu, 16 Jun 2016 21:23:00 +0000

Add spring-boot-starter-redis dependency to your pom file:

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-redis</artifactId>
</dependency>

Set Redis config in application.yml:

spring:

redis:

host: localhost

port: 6379

Set Redis Template, Cache Manager and @EnableCaching:

@SpringBootApplication

@EnableCaching

public class SpringBootApplication {

public static void main(String[] args) {

SpringApplication.run(SpringBootApplication .class, args);

}

@Bean

public RedisTemplate redisTemplate(RedisConnectionFactory jedisConnFactory) {

RedisTemplate redisTemplate = new RedisTemplate();

redisTemplate.setConnectionFactory(jedisConnFactory);

redisTemplate.setKeySerializer(new StringRedisSerializer());

redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());

return redisTemplate;

}

@Bean

public CacheManager cacheManager(RedisTemplate redisTemplate) {

RedisCacheManager redisCacheManager = new RedisCacheManager(redisTemplate);

redisCacheManager.setUsePrefix(true);

Collection cacheNames = new ArrayList<>();

cacheNames.add("user-accounts-cache");

redisCacheManager.setCacheNames(cacheNames);

Map expires = new HashMap<>();

expires.put("accounts-cache", 30L);

redisCacheManager.setExpires(expires);

return redisCacheManager;

}

Decorate method for caching;

@Cacheable(value = "user-accounts-cache")

public List getUserAccounts(String userId) {

return accountDao.getAccounts(userId);

}

Agile Magic on Twitter

noreply@blogger.com (Blogger) — Fri, 21 Aug 2009 17:28:00 +0000

Follow Agile Magic on Twitter: http://twitter.com/agilemagic

eclipse booster plugin: Easy Hibernate mapping generation!

noreply@blogger.com (Blogger) — Wed, 12 Aug 2009 01:09:00 +0000

Eclipse Booster Plugin is an Open Source Hibernate mapping generator that supports mapping of relationships, inheritance hierarchies, and collection type attributes. Booster Plugin uses application model classes to obtain data and generate code, so generating an Hibernate mapping file it's really easy:

Step 1: Code your application's Java model classes

Step 2: Create a project configuration

Step 3: Select the class you want to map and attributes to persist

Step 4: That's all!

You can download it from google code: http://code.google.com/p/hexacta-booster/downloads/list

Enjoy!

Is there a better way to programmatically retrieve a local variable IType from an EditorAction text selection in Eclipse?

noreply@blogger.com (Blogger) — Sat, 08 Aug 2009 18:19:00 +0000

public class MyEditorAction extends EditorAction {

/**

* @param unitEditor

* @return

private IDocument getDocument(final CompilationUnitEditor unitEditor) {

IDocumentProvider provider = unitEditor.getDocumentProvider();

IEditorInput input = unitEditor.getEditorInput();

IDocument document = provider.getDocument(input);

return document;

}

public void runAction() {

if (getTargetEditor() instanceof CompilationUnitEditor) {

CompilationUnitEditor unitEditor = (CompilationUnitEditor) getTargetEditor();

ICompilationUnit varContainerUnit = (ICompilationUnit) unitEditor.getViewPartInput();

IDocument document = getDocument(unitEditor);

try {

JavaTextSelection javaSelection = new JavaTextSelection(varContainerUnit.getTypes()[0].getTypeRoot(),

document, getTextSelection().getOffset(), getTextSelection().getLength());

ILocalVariable localVar = (ILocalVariable) javaSelection.resolveElementAtOffset()[0];

String varQualifiedTypeName = Signature.getSignatureSimpleName(localVar.getTypeSignature());

//At this point with variable's container unit and qualified type name, use search engine to retrieve IType...

IType varType = SearchEngine.getVarType(varQualifiedTypeName, varContainerUnit);

}

How to write a DOM Document to an xml file in java 1.5

noreply@blogger.com (Blogger) — Tue, 04 Aug 2009 02:13:00 +0000

private void writeXMLDocument(final Document doc, final String fileName) throws IOException {

// open output stream where XML Document will be saved

File xmlOutputFile = new File(fileName);

FileOutputStream fos;

Transformer transformer;

fos = new FileOutputStream(xmlOutputFile);

// Use a Transformer for output

TransformerFactory transformerFactory = TransformerFactory.newInstance();

transformerFactory.setAttribute("indent-number", new Integer(4));

try {

transformer = transformerFactory.newTransformer();

transformer.setOutputProperty(OutputKeys.INDENT, "yes");

transformer.setOutputProperty(OutputKeys.DOCTYPE_PUBLIC, "-//Hibernate/Hibernate Mapping DTD 3.0//EN");

transformer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM,

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd");

transformer.setOutputProperty(OutputKeys.ENCODING, "ISO-8859-1");

} catch (TransformerConfigurationException e) {

logger.error("Transformer configuration error: " + e.getMessage());

throw new IOException(e.getMessage());

}

DOMSource source = new DOMSource(doc);

StreamResult result = new StreamResult(new OutputStreamWriter(fos, "utf-8"));

// transform source into result will do save

try {

transformer.transform(source, result);

} catch (TransformerException e) {

logger.error("Error transform: " + e.getMessage());

}

How to: Simple system configuration reading and writing with Castor XML

noreply@blogger.com (Blogger) — Mon, 03 Aug 2009 23:13:00 +0000

Step 1: Create a Java object representing a system configuration.

Step 2: Add Castor Maven dependency to project's pom.

<groupId>org.codehaus.castor</groupId>

<artifactId>castor-xml</artifactId>

</dependency>

Step 3: Create castor.properties file with org.exolab.castor.indent=true.

Step 4: Read system configuration:

FileReader reader = new FileReader("system.cfg.xml");

SystemConfiguration systemConfiguration = (SystemConfiguration) Unmarshaller.unmarshal(SystemConfiguration.class, reader);

reader.close();

Step 5: Write system configuration:

FileWriter writer = new FileWriter("system.cfg.xml");

Marshaller.marshal(aSystemConfiguration, writer);

writer.close();

Log4j Eclipse Code Template

noreply@blogger.com (Blogger) — Sun, 02 Aug 2009 21:20:00 +0000

If you are tired of manualy adding static logger instances in classes, try this template ...

Under Preferences > Java > Editor > Templates:

Click new.
Give it a description and name.
Use this Pattern:

${:import(org.apache.log4j.Logger)}

private static final Logger LOG = Logger.getLogger(${enclosing_type}.class);

To apply it, type the template name and press ctrl + space.

Commonclipse plugin: A recurrent method generator.

noreply@blogger.com (Blogger) — Sun, 02 Aug 2009 19:38:00 +0000

Commonclipse is an eclipse plugin for jakarta commons-lang users. It features automatic generation of the following methods using commons-lang builders:

toString()
hashcode()
equals(Object)
compareTo(Object)

Commonclipse supports customization of generated methods (custom ToStringStyle, use of appendSuper(), excluded fields) through user defined properties. Commonclipse actions are available both in java editor views and in package explorer.

WebSite:

http://commonclipse.sourceforge.net/

Eclipse Booster Plugin: A private method testing tool.

noreply@blogger.com (Blogger) — Sun, 02 Aug 2009 18:02:00 +0000

When using reflection aproach to junit testing private methods it can become an error-prone, tedious and time consuming task. A private method call via Java Reflection API involves construction of formal and actual parameters as also method name specification as a string literal. Booster Plugin generates that code for you with just a few clicks.

Web Site:

http://code.google.com/p/hexacta-booster/