Simple Groovy project using Gradle

Hello fellow Groovyists :)

I have been kicking the tires on using Gradle for my Groovy projects. I had a few stumbles along the way and wanted to share what I came up with for getting a very simple example working.

build.gradle

apply plugin: 'groovy'
version = "1.0-${new Date().format('yyyyMMdd')}"

manifest.mainAttributes("Main-Class" : "com.javazquez.HelloThere")

repositories {
mavenCentral()
mavenRepo urls: "http://groovypp.artifactoryonline.com/groovypp/libs-releases-local"
}
dependencies {
groovy group: 'org.codehaus.groovy', name: 'groovy-all', version: '1.8.4'
groovy group: 'org.mongodb', name: 'mongo-java-driver', version: '2.6.5'
groovy group: 'com.gmongo', name: 'gmongo', version: '0.9.1'
testCompile "org.spockframework:spock-core:0.5-groovy-1.8"
}

jar {
from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
}

below is the the HelloThere.groovy file located src/main/groovy/com/javazquez/HelloThere

package com.javazquez
public class HelloThere {

public static void main(String []args) {
println "Hello coders!"

}

}

after running gradle build, I can navigate to the build/libs directory and run java -jar HelloThere-1.0-20111115.jar and get the following ouptut

Hello coders!

Gradle is a fantastic tool and I hope this article helps show the ease of getting a project set up.

2011 11 15

code
Gradle
Groovy
java
jvm
Uncategorized

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Writing a PayPal SOAP client with Java 6

I have always been mystified on the inner workings of SOAP. That was until I learned about the “wsimport” utility that comes with Java 6. It makes the entire process very easy. Below is an example of writing a SOAP client for PayPal’s Sandbox. This code will execute the SetExpressCheckout API call.

Just enter the following on your command line to generate the com.javazquez package

wsimport -keep -XadditionalHeaders -Xnocompile -p com.javazquez http://www.sandbox.paypal.com/wsdl/PayPalSvc.wsdl

open your favorite java editor(I used eclipse) and add the package(“com.javazquez”..created in the above command) to your new project

next, write some code to test out the APIs

package com.javazquez;

import javax.xml.ws.Holder;
public class TestEC {

public static void main(String[] args) {
SetExpressCheckoutReq req = new SetExpressCheckoutReq();
SetExpressCheckoutRequestType reqType = new SetExpressCheckoutRequestType();
SetExpressCheckoutRequestDetailsType details = new SetExpressCheckoutRequestDetailsType();
AddressType addr = new AddressType();
addr.cityName = "omaha";
addr.street1 = "123 main";
addr.country = CountryCodeType.US;
addr.name = "joe tester";

details.address = addr;
details.orderTotal = new BasicAmountType();
details.orderTotal.currencyID = CurrencyCodeType.USD;
details.orderTotal.value = "1.00";
details.cancelURL = "http://javazquez.com/cancel";
details.returnURL = "http://javazquez.com/return";

reqType.setVersion("2.10");

reqType.setExpressCheckoutRequestDetails = details;
req.setSetExpressCheckoutRequest(reqType);

UserIdPasswordType user = new UserIdPasswordType();
user.username = "XXX";
user.password = "XXXX";
user.signature = "XXXX";

PayPalAPIInterfaceService pp = new PayPalAPIInterfaceService();
PayPalAPIAAInterface pinterface = pp.getPayPalAPIAA();
Holder security = new Holder(new CustomSecurityHeaderType());
security.value.setCredentials(user);
try{
SetExpressCheckoutResponseType resp = pinterface.setExpressCheckout(req, security);
System.out.println(resp.token);
System.out.println(resp.correlationID);
for(ErrorType msg: resp.errors){
System.out.println(msg.longMessage);
}
}
catch(Exception ex){
System.out.println(ex.getMessage());

}
}

}

2011 02 18

code
java
jvm

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Login with Basic Authentication using Groovy

Hey there fellow Groovyists! I was recently in need of performing Basic Authentication on Apache using Groovy for a proof of concept. Below is what I was able to quickly put together.

//Here is a quick groovy 1.7.4 Basic Auth Example
@Grab(group=’org.codehaus.groovy.modules.http-builder’, module=’http-builder’, version=’0.5.0′ )

def authSite = new groovyx.net.http.HTTPBuilder( ‘http://10.110.201.115/~juanvazquez/basicAuth/’ )
authSite.auth.basic ‘user’, ‘pwd’
println authSite.get( path:’testAuth.html’ )

2010 11 01

Administration
apache
code
Groovy
Uncategorized

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Fun with Python

Hey there fellow developers :D
I have been working with Python lately(specifically Python3) and wanted to share some things I thought were pretty cool from an outsider’s(learning the language) perspective. I hope the following helps with getting to know this great language.. Enjoy 


#construct a tuple using()
t=(1,2,3)

#contruct a list using []
 lst= [1,2,4]

#iterate a string and print each character
for i in "This is a String":
	print(i)

#getting the length of a string
print ("length is",len("12345"))	

#test x is in a range
x=6
if(3< x <10 ):
	print( "I am true")
else:
	print( "I am false")

#test membership

if "2" in "1234":
	print("I am in the string")
if int("2") in [1,2,3,4]:
	print( "I am in the list")

#replication
print( "hithreetimes, "*3)

#using math class
import math
print(math.sqrt(4))

#print all methods
print(dir(math))

#named Tuples
import collections
Movie = collections.namedtuple("Movie","title rating")
collection =[Movie("Jaws", 4.0)]
collection.append(Movie("Toy Story", 5.0))
for movie in collection:
	print("I watched {0} and gave it {1} stars".format(movie.title,movie.rating))

#sequence unpacking
head, *rest = [1,2,3,4,5]
print("head is {0} and rest is {1}".format(head,rest))

#passing and unpacking parameters
def fullname(f,m,l):
	print("First Name ="+f)
	print("Middle Name ="+m)
        print("Last Name  ="l)

fakenamelist =["Homer","J","Simpson"]
fullname(*fakenamelist)		

#list comprehensions (print all odd numbers from 0 to 99)
print( [item for item in range(0,100) if item % 2])

#named parameters
def count_animals(number,*,	animal="ducks"):
	return "{0} {1}".format(number,animal)
print( count_animals(3,animal="cows"))
print( count_animals(3))

print(sorted([-1,2,-3],key=abs)) #same order

line = input("enter something.. ")
print("your line was " ,line)

I have been using python for web requests and recommend using the httplib2 library. It has a lot of really nice features.

2010 08 31

code
python
Uncategorized

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Ruby to Python Primer

If your like me, you bounce around between languages a lot. Lately, I have been writing python code. It’s not Ruby :D , but it can get the job done. Here is a quick list of similarities between the two languages. I hope it helps… don’t forget to this list in the comments section ;)

#-----find object methods-----
s="hello, I am a string"

#ruby
puts s.methods

#python
print dir(s)

#find out more about a method using python
help(s.split)

#-----view object's class-----
#ruby
s.class

#python
s.__class__

#------Iterate hashes-------

#ruby
h.each{|key,value| puts "#{key}, #{value}"}

#python
for key,value in h.iteritems():
print key, value

#---ternary operators

#ruby
condition ? var = x : var = y

#python.. not exactly an operator, but you get the meaning
#---- var = y if condition is false
var = x if condition else y

#----lengths------
#ruby
s="hello, I am a string"
puts "Length of string is #{s.length} or #{s.size}"

h={:one=>2,:three=>4}
puts "Length of hash is same as string, #{h.length} or #{h.size} "

#python
print("This is the length of a string %s" % len("string"))
print("number of key/value pair= %d" % len({'one':1,'two':2}))

#---slicing lists/arrays
l=[1,2,3,4,5]

#ruby
l[1..3] #=>[2,3]

#python
l[1:3] #=>[2,3]

#--print string multiple times-----

#ruby
4.times{print "hello"} #=> hellohellohellohello

#python
print("hello" * 4) #=> hellohellohellohello

2008 12 16

code
python
Ruby
Uncategorized

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BarCamp Omaha

I have just been informed/invited to Omaha’s BarCamp! According to the site, this is a “unconference born from the desire for people to share and learn in an open environment.”

The list of topics that have been submitted thus far are already enough to get any developer’s inner geek super-charged. At this point I am not sure what I will talk about, but here are a few ideas.

  1. uploading/updating multiple models in one form (ROR)
  2. Groovy and flickr
  3. Action Script 3 concepts
  4. Linux Administration
  5. Setting up Twiki

Any suggestions or votes on what I could bring to the BarCamp would be awesome. If you can make it, I suggest checking this event out! After all, you don’t want to be sitting there listening to you fellow IT buddies raving about the great time they had learning at BarCamp…right?

2008 07 01

code
Linux

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