Skip execution of method in specific time of day

/* this test fails if the current time is between 12:00am and 3:00am*/

Calendar now = Calendar.getInstance();
int hour = now.get(Calendar.HOUR_OF_DAY);
String timeCheck = "Current time not between 12:00am and 3:00am";
String timeDescription = "Current time" + ((hour < 3) ? "" : " not") + " between 12:00am and 3:00am";
Assume.assumeThat(timeDescription, equalTo(timeCheck));

Assume is package org.junit;(public class Assume )

ANTLR

Today i worked with some text character parsing. In our project, they have used ANTLR parser. ANTLR, ANother Tool for Language Recognition, is a language tool that provides a framework for constructing recognizers, interpreters, compilers, and translators from grammatical descriptions containing actions in a variety of target languages. ANTLR provides excellent support for tree construction, tree walking, translation, error recovery, and error reporting.

http://www.antlr.org/

We have used both Class LLkParser and Class Parser.Alos one important interface that provides is Interface AST in antlr.collections.

http://www.antlr2.org/javadoc/antlr/LLkParser.html
http://www.antlr2.org/javadoc/antlr/Parser.html#LA(int)
http://www.antlr2.org/javadoc/antlr/collections/AST.html

Payment gateway

A payment gateway is an e-commerce application service provider service that authorizes payments for e-businesses, online retailers, bricks and clicks, or traditional brick and mortar. Paypal and SecurePay are two common payment gateways. Following are the list of gateways.

http://www.paymentgatewaydirectory.com/

In our project we use saferpay payment gateway. In billing-services.xml,
< bean id="billing.paymentService"
class="com.fastsearch.admomentum.billing.service.DefaultPaymentService">
. . .
< !-- this bean is defined in fast-admomentum-paymentgateway.jar -->
< property name="paymentGateway" ref="saferpayPaymentGateway" />
. . .
< /bean>

and in base-configuration.properties, there are lots of configurations.
one of them are,

# The merchant account id with Saferpay
com.fastsearch.admomentum.paymentgateway.saferpay.accountId=XXXXX-XXXXXXXXX

Java Unit testing

This is a simple test class i wrote to test following method.

package com.fastsearch.admomentum.common.time;

import java.io.Serializable;
import java.util.Calendar;
........

public class DateRange implements Serializable {

.....

public boolean isBetween(Calendar date) {
if (getEnd() != null) {
return (date.after(getStart()) && date.before(getEnd()))
|| date.equals(getStart()) || date.equals(getEnd());
} else {
return date.after(getStart()) || date.equals(getStart());
}
}
}

----------------------------------------------

package com.fastsearch.admomentum.common.time;

import junit.framework.TestCase;
import java.util.Calendar;


public class DateRangeUnitTest extends TestCase {

private DateRange dateRange;

public void testIsBetween()
{
assertFalse(isBetweenOutOfBoundTest());
}

private boolean isBetweenOutOfBoundTest()
{
Calendar testDate = Calendar.getInstance();
testDate.clear();
testDate.set(Calendar.YEAR,2007);
testDate.set(Calendar.MONTH,4);
testDate.set(Calendar.DATE,1);

Calendar startDate = Calendar.getInstance();
startDate.clear();
startDate.set(Calendar.YEAR,2007);
startDate.set(Calendar.MONTH,5);
startDate.set(Calendar.DATE,1);

Calendar endDate = Calendar.getInstance();
endDate.clear();
endDate.set(Calendar.YEAR,2007);
endDate.set(Calendar.MONTH,7);
endDate.set(Calendar.DATE,1);

dateRange = new DateRange(startDate, endDate);
return dateRange.isBetween(testDate);
}
}

mvn commands

- clean
mvn clean

- build
mvn install

- skip all the test
mvn install -P test-unit -Dmaven.test.skip=true
mvn install -o -P test-unit -Dmaven.test.skip=true

- run all the tests including selenium tests
mvn -Ptest-all install

- run specific tests (unit test or selenium test)
mvn install -Ptest-all -Dtest=com.fastsearch.admomentum..ClassName
mvn install -P test-all -Dtest=AdvertisementSeleniumTest
mvn install -Dtest=com.fastsearch.admomentum.common.time.DateRangeUnitTest -o -Ptest-all

- run specific tests (unit test or selenium test) with degugging
mvn install -Dtest=com.fastsearch.admomentum.admanager.webapp.selenium.campaign.CampaignSeleniumTest -o -Dmaven.surefire.debug -Ptest-all
mvn install -Dtest=com.fastsearch.admomentum.admanager.reporting.DefaultReportingServiceUnitTest -o -Dmaven.surefire.debug -Ptest-all

Cargo

Cargo is a thin wrapper around existing containers (e.g. J2EE containers). It provides different APIs to easily manipulate containers.

Cargo provides the following APIs:

* A Java API to start/stop/configure Java Containers and deploy modules into them. Also Ant tasks, Maven 1, Maven 2 plugins. Intellij IDEA and Netbeans plugins are offered.
* A Java API to parse/create/merge J2EE Modules

Following are some containers.

* Geronimo 1.x
* JBoss 3.x
* JBoss 4.x
* Jetty 4.x
* Jetty 5.x
* Jetty 6.x
* jo 1.x
* Oc4J 9.x
* Orion 1.x
* Orion 2.x
* Resin 2.x
* Resin 3.x
* Tomcat 3.x
* Tomcat 4.x
* Tomcat 5.x
* WebLogic 8.x

Difference between 'vi' and 'vim' editors

vim is 'vi improved'
More powerful, etc

http://www.dc.turkuamk.fi/docs/soft/vim/vim_diff.html

Job scheduling with Quartz

Quartz is an open source job scheduling framework that provides simple but powerful mechanisms for job scheduling in Java applications. Quartz allows developers to schedule jobs by time interval or by time of day. The two fundamental units of Quartz's scheduling package are jobs and triggers. A job is an executable task that can be scheduled, while a trigger provides a schedule for a job.
Also, any singular job can have many triggers associated with it.

A CronTrigger allows for more specific scheduling than a SimpleTrigger and is still not very complex. Based on cron expressions, CronTriggers allow for calendar-like repeat intervals rather than uniform repeat intervals -- a major improvement over SimpleTriggers.
A "Cron-Expression" is a string comprised of 6 or 7 fields separated by white space. There are 6 mandatory and 1 optional fields.

Field Name
Seconds
Minutes
Hours
Day-of-month
Month
Day-of-Week
Year (Optional)

Expression Meaning
"0 0 12 * * ?" Fire at 12pm (noon) every day

useful links:
http://www-128.ibm.com/developerworks/java/library/j-quartz/

http://quartz.sourceforge.net/javadoc/org/quartz/CronTrigger.html

Daylight saving time

Daylight saving time (DST; also summer time in British English; see Terminology) is the convention of advancing clocks so that afternoons have more daylight and mornings have less. Typically clocks are adjusted forward one hour near the start of spring and are adjusted backward in autumn.

http://en.wikipedia.org/wiki/Daylight_saving_time

In Java, there are two ways to create days. One method is using Calender object.

Calendar c = Calendar.getInstance();
c.clear();
c.set(Calendar.YEAR,2007);
c.set(Calendar.MONTH,9);
c.set(Calendar.DATE,31);
System.out.println(c.getTime());
c.add(Calendar.DATE,1);
System.out.println(c.getTime());

private List calculateIntervals(DateRange dateRange) {
Date date = dateRange.getStart().getTime();
Calendar c = Calendar.getInstance();
c.clear();
c.setTimeZone(dateRange.getStart().getTimeZone());
c.setTime(dateRange.getStart().getTime());
List dates = new ArrayList();
while (c.getTime().compareTo(dateRange.getEnd().getTime()) <= 0) {
dates.add(c.getTime());
Calendar nextDate = (Calendar) c.clone();
nextDate.add(Calendar.DATE,1);
c = nextDate;
}
return dates;
}

This timezone don't work with daylight saving time. The other way is using Date object.

private List calculateIntervals(DateRange dateRange) {
Date date = dateRange.getStart().getTime();
List dates = new ArrayList();
while (date.compareTo(dateRange.getEnd().getTime()) <= 0) {
dates.add(date);
Date nextDate = (Date) date.clone();
nextDate = DateUtils.addDays(nextDate, 1);
date = nextDate;
}
return dates;
}

This Date object time zone cater with daylight-saving time. In date object->cdate->daylightSaving parameter contains the time in milisecond that should add to the date for daylight-saving changes.