ixlibs

Collection of small libraries for Xtend

logging

Simple active annotation for Xtend, which automaticly generate helper methods for logging for various frameworks. Currently it is possible to switch between using

• java.util.logging
• slf4j (logback)
• plain log4j

Usage:

@Logging(type="Slf4J")
class Slf4jTest {
	def method() {
		info [|"hello world!"]
		debug [|"logging "]		
	}	
}

or

@Logging(type="JavaUtilLogging")
class JULTest {
    def method() {
        info [|"hello world!"]
        debug [|"logging "]		
    }	
}

or

@Logging(type="Log4J")
class Log4jTest {
    def method() {
        info [|"hello world!"]
        debug [|"logging "]		
    }	
}

where the info and debug methods take a lambda method, which only called, if the actual logging level is enabled. Unfortunately, due for a bug, the 'type' in the annotation must be a string, and can't be an enumeration.

properties

Improved version of the built-in @Property annotation :

• generate setters which returns the current object, for chaining the calls
• apply transformations on getters and setters, so only a copy is setted/getted.

Usage:

class UserBean {
    // Readonly
    @Property(write=false, readFunction = "$ == null ? \"unknown\" : $.toUpperCase()" ) String name 

    // The returned list is an unmodifiable list
    @Property(readFunction="java.util.Collections.unmodifiableList($)") List<Role> roles

    // The date is copied, instead of referred 
    @Property(writeFunction="new java.util.Date($.getTime())") Date birth

    @Property(builder=true) String city
    @Property(builder=true) String zip
}

will create:

public String getName() {
  return _name == null ? "unknown" : _name.toUpperCase();
}

public List<String> getRoles() {
    return java.util.Collections.unmodifiableList(_roles);
}

public void setBirth(final Date value) {
    this. _birth = new java.util.Date(value.getTime());
}

public String getCity() {
    return _city;
}

public UserBean setCity(final String value) {
    this. _city = value;
    return this;
}

public String getZip() {
    return _zip;
}

public UserBean setZip(final String value) {
    this. _zip = value;
    return this;
}

elastix

This module provides ElasticSearch related annotations (http://www.elasticsearch.org/), just add @ElasticStorable annotation to the class, for example:

import com.github.ixlibs.macro.elastix.ElasticStorable
import com.github.ixlibs.macro.elastix.Id
import java.util.Date

@ElasticStorable
class Product {
    @Id @Property String id

    @Property String name
    @Property Long price

	@Property Date created
    @Property Date lastModified

    @Property String[] tags
}

this will add the interface ElasticSearchObjectModel, and provides the necessary methods for the implementations. To index an objet with ElasticSearch :

org.elasticsearch.client.Client client = ...;
val indexRequestBuilder = client.prepareIndex
product.serialize(indexRequestBuilder)
val IndexResponse response = indexRequestBuilder.get

To load back :

val searchBuilder = client.prepareSearch("mydatabase").setTypes(Product::ElasticType)
searchBuilder.setQuery(matchQuery("name", "someProductName"));
val response = searchBuilder.get

val Iterable<Product> producs = response.hits.map(Product::BUILDER)