Change constraint

Table simmapping has foreign key to msisdn on 2 columns msisdn and providerId.
Change key so you can do update on providerId
Database: postgres.

ALTER TABLE public.simmapping
DROP CONSTRAINT fk_simmapping_msisdn,
ADD CONSTRAINT fk_simmapping_msisdn
   FOREIGN KEY (msisdn, msisdn_providerid)
   REFERENCES msisdn(msisdn, providerid)
   ON UPDATE CASCADE;

JPA Composite Key

Create class that will represent composite key and has implemented hashCode and equals methods.

public class MsisdnCompositeKey implements Serializable
{
private static final long serialVersionUID = 1L;

private String msisdn;
private Long providerId;
.....


Class that uses this composite key needs to be annotated with @IdClass and have same fields (msisdn and providedId as in example).

@Entity
@Table(name = "MSISDN")
@IdClass(value = MsisdnCompositeKey.class)
public class Msisdn
{
private static final long serialVersionUID = 1L;

@Id
private String msisdn;
@Id
private Long providerId;

.....

Ref:
https://stackoverflow.com/questions/13032948/how-to-create-and-handle-composite-primary-key-in-jpa

Spring MessageSource

Read message source without injecting it or using spring context

ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
messageSource.setDefaultEncoding("UTF-8");
messageSource.setBasename("messages");

Use message source as you want now on.

wsdl2java notes

* Simple type "MAXEXTGBRUPL_OutType" was not mapped to Enum due to EnumMemberSizeCap limit. Facets count: 502, current limit: 256. You can use customization attribute "typesafeEnumMaxMembers" to extend the limit.
<jaxb:globalBindings typesafeEnumMaxMembers="2000">

* Problems with underscores in names:
<jaxb:globalBindings underscoreBinding="asCharInWord" >

* A class/interface with the same name "hr.samara.RspHeaderType" is already in use. Use a class customization or the -autoNameResolution option to resolve this conflict.
add -autoNameResolution to wsdl2java.bat 
"%JAVA_HOME%\bin\java" -Xmx128M -Djava.endorsed.dirs="%CXF_HOME%\lib\endorsed" -cp "%CXF_JAR%;%TOOLS_JAR%;%CLASSPATH%" -Djava.util.logging.config.file="%CXF_HOME%\etc\logging.properties" org.apache.cxf.tools.wadlto.WADLToJava -autoNameResolution %*

Example of jaxb bindings file:

<jaxb:bindings
    xmlns:jaxb="http://java.sun.com/xml/ns/jaxb"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc"
    jaxb:extensionBindingPrefixes="xjc"
    jaxb:version="2.0">
    <jaxb:globalBindings typesafeEnumMaxMembers="2000" >
<xjc:serializable/>
    </jaxb:globalBindings>
</jaxb:bindings>

Ant script code:

<property name="cxf.home" location="/apache-cxf-2.7.10/" />

<!-- generate classes from wsdl -->
<path id="cxf.classpath">
<fileset dir="${cxf.home}/lib">
<include name="*.jar"/>
</fileset>
</path>

<target name="cxfWSDLToJava-HSS9860WSDL.wsdl">
<java classname="org.apache.cxf.tools.wsdlto.WSDLToJava" fork="true">
<arg value="-p"/>
<arg value="hr.samara.generated.HSS9860"/>
<arg value="-d"/>
<arg value="src/main/java"/>
<arg value="-verbose"/>
<arg value="-b" />
<arg value="src/main/resources/jaxbbindings.xml" />
<arg value="-autoNameResolution" />
<arg value="src/main/resources/HSS9860/HSS9860WSDL.wsdl"/>
<classpath>
<path refid="cxf.classpath"/>
</classpath>
</java>
</target>


Ref:
http://cwweng.tumblr.com/post/7000245700/wsdltojava-error-thrown-by-jaxb-two-declarations
https://cxf.apache.org/docs/wsdl-to-java.html

Mockito notes

Mocking

Scenario:

In service class you want to mock dao call.
In service class make dao class package private (no modifier - optional).
Write test in same package (under test subfolder, not main).
Dao class has method called testingMockito(String someString);

Code example:

SomeService service; //injected
SomeDao dao = Mockito.mock(SomeDao.class);
service.setDao(dao); // or service.dao = dao;
//throw Exception when calling dao class
Mockito.doThrow(someException).when(dao).testingMockito(Mockito.anyString());


Verify

Mockito.verify(simCardServiceMock, Mockito.times(1)).findSimCard(simIdentifier);


Mock void methods:
1st service returns some response, 2nd service calls void method.

CustomerSearchService customerSearchService = Mockito.mock(CustomerSearchService.class);
Mockito.when(customerSearchService.searchSubscription(providerId, searchCriteria)).thenReturn(subscription);

final SubscriptionService subscriptionService = Mockito.mock(SubscriptionService.class);
Mockito.doNothing()
.when(subscriptionService)
.activateSubscription(providerId, subscription.getId());


Ref:
https://stackoverflow.com/questions/14889951/how-to-verify-a-method-is-called-two-times-with-mockito-verify
http://www.baeldung.com/mockito-behavior
https://stackoverflow.com/questions/2276271/how-to-make-mock-to-void-methods-with-mockito

Redis notes

KEYS * - Returns all keys matching pattern.
FLUSHDB - Delete all the keys of the currently selected DB
FLUSHALL - Delete all the keys of all the existing databases, not just the currently selected one.

Hashes

Hashes are maps between string fields and string values, so they are the perfect data type to represent objects
(eg: A User with a number of fields like name, surname, age, and so forth)
HGETALL key - lists all fields

Sets

Sets are an unordered collection of Strings.
SMEMBERS key - Get all the members in a set

Sorted Sets

Sorted Sets are, similarly to Redis Sets, non repeating collections of Strings. The difference is that every member of a Sorted Set is associated with score, that is used in order to take the sorted set ordered, from the smallest to the greatest score. While members are unique, scores may be repeated.
ZCARD key - Get the number of members in a sorted set
ZRANGE key start stop [WITHSCORES] - Return a range of members in a sorted set, by index

Ref:
Redis homepage
Redis for the real world (IBM - Java development 2.0)

Quartz notes

The key interfaces of the Quartz API are:

Scheduler - the main API for interacting with the Scheduler.
Job - an interface to be implemented by components that you want the Scheduler to execute.
JobDetail - used to define instances of Jobs.
The JobDataMap can be used to hold any amount of (serializable) data objects which you wish to have made available to the job instance when it executes.
Trigger - a component that defines the schedule upon which a given Job will be executed.
(Quartz ships with a handful of different trigger types, but the most commonly used types are SimpleTriggerand CronTrigger.)
JobBuilder - used to define/build JobDetail instances, which define instances of Jobs.
TriggerBuilder - used to define/build Trigger instances.

Misfire Instructions

A misfire occurs if a persistent trigger misses its firing time because of the scheduler being shutdown, or because there are no available threads in Quartz's thread pool for executing the job.
The different trigger types have different misfire instructions available to them. By default they use a 'smart policy' instruction - which has dynamic behavior based on trigger type and configuration. When the scheduler starts, it searches for any persistent triggers that have misfired, and it then updates each of them based on their individually configured misfire instructions.

For CronTriggers: The 'smart policy' instruction is interpreted as MISFIRE_INSTRUCTION_FIRE_NOW

Note that if a trigger's time to fire arrives, and there isn't an available thread, Quartz will block (pause) until a thread comes available, then the Job will execute some number of milliseconds later than it should have.
This may even cause the thread to misfire if there is no available thread for the duration of the scheduler's configured “misfire threshold”.

Listeners

Listeners are objects that you create to perform actions based on events occurring within the scheduler.
As indicated by their names, TriggerListeners receive events related to triggers, and JobListeners receive events related to jobs.
Trigger-related events include: trigger firings, trigger misfirings, and trigger completions (the jobs fired off by the trigger is finished).

JobDataMap

JobDetail contains various property settings for the job, as well as a JobDataMap, which can be used to store state information or provide properties/configuration for a given instance of your Job class.
Triggers may also have a JobDataMap associated with them. A JobDataMap is useful for passing to a job parameters that are specific to the firings of the trigger.

The JobDataMap that is found on the JobExecutionContext during Job execution serves as a convenience.
It is a merge of the JobDataMap found on the JobDetail and the one found on the Trigger, with the values in the latter overriding any same-named values in the former.

If you add setter methods to your job class that correspond to the names of keys in the JobDataMap, then Quartz's default JobFactory implementation will automatically call those setters when the job is instantiated, thus preventing the need to explicitly get the values out of the map within your execute method.

JobStores

JobStores are responsible for keeping track of all the work data you give to the scheduler: jobs, triggers, calendars, and so forth.

How to fire scheduled job asap?

Example:

select * from qrtz_triggers;
           trigger_name           | trigger_group |           job_name           | job_group | is_volatile | description | next_fire_time | prev_fire_time | priority |
trigger_state | trigger_type |  start_time   | end_time | calendar_name | misfire_instr | job_data
----------------------------------+---------------+------------------------------+-----------+-------------+-------------+----------------+----------------+----------+-
--------------+--------------+---------------+----------+---------------+---------------+----------
 portReconciliationProcessTrigger | DEFAULT       | portReconciliationProcessJob | DEFAULT   | f           |             |  1426579200000 |  1426492800000 |        5 |
WAITING       | CRON         | 1378612922000 |        0 |               |             0 | \x


next fire time:     1426579200000 -> http://www.epochconverter.com/ ->
GMT: Tue, 17 Mar 2015 08:00:00 GMT
Your time zone: 3/17/2015, 9:00:00 AM GMT+1:00

Fire it in near future: 13.3.2015 15:00 -> converter ->
Epoch timestamp: 1426518000
Timestamp in milliseconds: 1426518000000

Update db
UPDATE qrtz_triggers SET next_fire_time = '1426518000000' WHERE trigger_name = 'portReconciliationProcessTrigger';

Delete triggers from db

delete from qrtz_cron_triggers;
delete from qrtz_triggers;
delete from qrtz_job_details;

Ref:
Quartz_Scheduler_Developer_Guide v2.2.1
Quartz scheduler misfire instructions explained

Quartz 1.8.x to Quartz 2.0 Migration Guide
Spring - Task Execution and Scheduling

svn tips

status

$ svn status

update

$ svn up

revert

$ svn revert *

revert to previous version (undo commit)

$ svn merge -r HEAD:12345 .

ignore files

$ svn propset svn:ignore "someFile" .

link to another/external directory as part of your project

set property:
$ svn propset svn:externals https://myServer/build/common common

checkout

$ svn checkout repositoryURL destinationDirectory

Ref

How do I ignore files in Subversion?
Revert to a Previous Version in Subversion

Dependency injection in Spring

Injecting beans

@org.springframework.beans.factory.annotation.Autowired
@javax.inject.Named("beanId")

Injecting properties file values

@org.springframework.beans.factory.annotation.Value("${key.in.file}")
private String hostName;

Injecting util: list, set, map

@javax.annotation.Resource(name="mySet")

private Set<Action> allTrafficActions;

set is defined in xml:
<util:set id="mySet" set-class="java.util.HashSet"
value-type="com.api.types.Action">
<value>DATA</value>
<value>SMS_MO</value>
<value>MMS_MO</value>
</util:set>
com.api.types.Action is enum.


Inject list from properties file:
internal.operators.ids=10005,216,217
you can inject it with expression:
@org.springframework.beans.factory.annotation.Value("#{'${internal.operators.ids}'.split(',')}")
private List<String> internalOperators;

Use @Value as optional.
There is no need to be specified/defined in properties file.
E.g.
@Value("${external.createsim:true}")
boolean notifyExternalHandler = true;


Use property as message template
template.file=/opt/polite/{0}.prov

In code inject value and use MessageFormater to replace {0}:
@Value("${template.file}")
String postpaidFilename = "/opt/{0}.prov";

String filename = java.text.MessageFormat.format(postpaidFilename, "123");

Result filename is /opt/polite/123.prov


Ref:
http://kh-yiu.blogspot.com/2013/08/spring-injecting-properties-file-values.html
http://samaratips.blogspot.com/2011/07/spring-autowired.html
https://stackoverflow.com/questions/12576156/reading-a-list-from-properties-file-and-load-with-spring-annotation-value
http://www.captaindebug.com/2012/01/autowiring-using-value-and-optional.html
http://www.baeldung.com/2012/02/06/properties-with-spring/

Count

Using criteria API:

session.createCriteria(Book.class).setProjection(Projections.rowCount()).uniqueResult();

or native SQL:

session.createQuery("select count(*) from Book").uniqueResult()

Ref:

https://stackoverflow.com/questions/1372317/how-do-we-count-rows-using-hibernate

Web services

Abbreviations

WWW	World Wide Web
HTTP	HyperText Transfer Protocol
W3C	World Wide Web Consortium
IETF	Internet Engineering Task Force

SOAP - Simple Object Access Protocol
WSDL - Web Services Description Language (pronounced "whiz dull")
REST - Representational State Transfer

JAX-WS - Java API for XML Web Services

JAX-RS - Java API for RESTful Web Services

WAR - Web ARchive

AJAX - Asynchronous JavaScript with XML

SEI - Service Endpoint Interface

SIB - Service Implementation Bean

Ref:

The Java EE 6 Tutorial - Web services

Java Web Services: Up and Running, Second Edition, by Martin Kalin

http://www.codejava.net/java-ee/web-services/java-web-services-binary-data-transfer-example-base64-encoding
http://www.codejava.net/java-ee/web-services/using-mtom-to-optimize-binary-data-transfer-with-jax-ws-web-services

Expose 2 or more interfaces as one service (wsdl)

Using cxf, wsdl that should have all methos/operation from all interfaces had exposed only methods from first interface!

Solution: 

Make 3rd interface that extends interfaces that one needs to expose and implement it.

Ref:

https://stackoverflow.com/questions/2420215/multiple-webservice-annotations-in-jax-ws-cxf

Start/stop Tomcat from ANT

<project name="Stop/start Tomcat with local deploy">

<property name="tomcat.home" value="D:/apache-tomcat-7.0.47" />
<property name="project.name" value="samara-provisioning" />
<property name="dist.dir" value="dist/artefacts" />

<!-- deploy-local: delete and copy war -->
<target name="deploy-local" depends="tomcat-stop">

<delete>
<fileset dir="${tomcat.home}/webapps">
<include name="${project.name}.war" />
</fileset>
</delete>
<delete dir="${tomcat.home}/webapps/${project.name}" />

<copy todir="${tomcat.home}/webapps">
<fileset dir="${dist.dir}">
<include name="**/${project.name}.war" />
</fileset>
</copy>

<tstamp>
<format property="TODAY" pattern="HH:mm:ss:sss zzz"
locale="en" />
</tstamp>
<echo> Build Completed At: ${TODAY}</echo>

</target>

<!-- start tomcat, it depends on deploy-local -->
<target name="tomcat-start" depends="deploy-local">
<java classname="org.apache.catalina.startup.Bootstrap"
failonerror="true" fork="true">
<classpath
path="${tomcat.home}/bin/bootstrap.jar:${tomcat.home}/bin/tomcat-juli.jar" />
<jvmarg
value="-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager" />
<jvmarg
value="-Djava.util.logging.config.file=${tomcat.home}/conf/logging.properties" />
<jvmarg value="-Dcatalina.home=${tomcat.home}" />
<jvmarg value="-Dcatalina.base=${tomcat.home}" />
<jvmarg value="-Djava.io.tmpdir=${tomcat.home}/temp" />
<arg line="start" />
</java>
</target>

<!--stopping tomcat , if it is found running -->
<target name="tomcat-stop" if="tomcat.running" depends="check-port">
<echo message="Tomcat is running...stopping it" />
<java classname="org.apache.catalina.startup.Bootstrap" fork="true">
<classpath
path="${tomcat.home}/bin/bootstrap.jar:${tomcat.home}/bin/tomcat-juli.jar" />
<jvmarg value="-Dcatalina.home=${tomcat.home}" />
<arg line="stop" />
</java>
</target>

<!-- Check whether Tomcat is running -->

<target name="check-port" description="Check whether Tomcat is running">
<echo message="Checking whether Tomcat is running" />
<condition property="tomcat.running">
<socket server="localhost" port="8080" />
</condition>
</target>

</project>


Ref:
http://techfindouts.blogspot.com/2013/08/how-to-restart-stopstart-tomcat-using.html
http://linuxclicks.blogspot.com/2011/04/java-ant-target-to-startstop-apache.html

Hibernate/persistence annotations

Some useful annotations when using
hibernate.hbm2ddl.auto to update | create | create-drop
If hbm2ddl.auto is set to update it will not change type of field!
     postgres:  ALTER TABLE users ALTER COLUMN role TYPE varchar(16);

javax.persistence.Lob with/without org.hibernate.annotations.Type

Using postgres and omitting Type for text lobs will cause numbers in database tables. 

Like operator will not work!

Solution:

@Lob

@Type(type = "org.hibernate.type.TextType")

If there was version without @Type and you want to update/migrate, please share your expirience.
(If you add @Type, old records will be read as plain strings.)
// This was tested with hibernate 3.6.10. and 5.1.0

org.hibernate.annotations.ForeignKey

Very useful for not having generated names as foreign keys.

In JPA 2.1 you can use javax.persistence.ForeignKey
@JoinColumn(foreignKey = @ForeignKey(name = "FK_ORDER_CUSTOMER"))

javax.persistence.Enumerated(javax.persistence.EnumType.STRING)

When using enum, store it in db as string, not a number

javax.persistence.Id with javax.persistence.Column

This combination will cause a lot of problems with hsqldb (column annotation is same like Id constraint). Postgres will not complain.

@Id

@Column(name = "ID", nullable = false, unique = true)

Solution:

remove nullable and unique

Tested on hsqldb 2.3.2 (as in memory) and postgres 9.2/9.3

Ref:

http://www.shredzone.de/cilla/page/299/string-lobs-on-postgresql-with-hibernate-36.html
http://java.dzone.com/articles/postgres-and-oracle

Java .class version

javap - The Java Class File Disassembler

Usage

   javap -verbose YourClass

Output

  ...
  SourceFile: "YourClass.java"
  minor version: 0
  major version: 50
  flags: ACC_PUBLIC, ACC_SUPER
  ...

Major version

J2SE 7 = 51,
J2SE 6.0 = 50,
J2SE 5.0 = 49,
JDK 1.4 = 48,
JDK 1.3 = 47,
JDK 1.2 = 46,
JDK 1.1 = 45

Ref:
http://reverseengineering.stackexchange.com/questions/1328/find-out-a-java-class-files-compiler-version
http://docs.oracle.com/javase/7/docs/technotes/tools/windows/javap.html

Postgres tips

Log to database

psql -p port -U user database

Show databases

\l

Show tables

\d

Describe table

\d+ table_name

Exit

\q

Import script from terminal

(when database was exported in sql file)

psql -p port -U user -d dest_db -a -f fileName.sql
   (psql -U prov -d prov -a -f model-prov.sql)

Select TOP 5 records, char_length

SELECT string1, char_length(string1) FROM table1 ORDER BY createDate DESC LIMIT 5;

Dump (export) database

pg_dump -U user source_db -p port -f fileName.sql

List sequences

\ds
or by using SQL:
SELECT c.relname FROM pg_class c WHERE c.relkind = 'S';

list sequence dependencies

SELECT p.relname, a.adsrc FROM pg_class p JOIN pg_attrdef a ON (p.relfilenode = a.adrelid);

To get last value of a sequence use the following query:

SELECT last_value FROM test_id_seq;

remove a sequence

DROP SEQUENCE sequenceName;

Change column type

ALTER TABLE ad_hoc_history ALTER COLUMN parameters TYPE text;
(http://www.postgresql.org/docs/9.3/static/sql-altertable.html)

* change the size of a varchar column:
ALTER TABLE simlocation ALTER COLUMN location TYPE varchar(30);

drop constrain (NOT NULL)

ALTER TABLE table ALTER COLUMN column DROP NOT NULL;

Is some range present in system

Table is msisdn and msisdn is key, but it is string.
select count(*) from msisdn where to_number(msisdn,'9999999999999') >=4366305707030 and to_number(msisdn,'9999999999999') <=4366305712029;

Ref:
http://www.postgresqlforbeginners.com/2010/11/interacting-with-postgresql-psql.html
http://www.postgresql.org/docs/9.3/static/app-psql.html
http://www.postgresql.org/docs/9.3/static/functions-string.html
dump:
http://www.thegeekstuff.com/2009/01/how-to-backup-and-restore-postgres-database-using-pg_dump-and-psql/
http://www.postgresql.org/docs/9.3/static/app-pgdump.html
sequences:
http://www.neilconway.org/docs/sequences/
http://blog.sensible.io/2013/08/24/postgresql-sequences-and-array-column-types.html http://www.linuxtopia.org/online_books/database_guides/Practical_PostgreSQL_database/PostgreSQL_x14316_001.htm
http://www.techonthenet.com/postgresql/functions/to_number.php

Linux tips

yum manager

The Yellowdog Updater, Modified (yum) is an open-source command-line package-management utility for Linux operating systems using the RPM Package Manager. Though yum has a command-line interface, several other tools provide graphical user interfaces to yum functionality. Yum allows automatic updates, package and dependency management, on RPM-based distributions. Yum works with software repositories (collections of packages), which can be accessed locally or over a network connection.

install: yum install mvno-paygw
find: yum search mvno-paygw
update: yum update mvno-paygw
info: yum info mvno-paygw  (information about package; what version is on repository)
check-update: Checks to see whether updates are available. If they are, yum displays their names, version and repository area.
provides: searches for which packages provide the requested dependency of file. This also takes wildcards for files. E.g. yum provides */ldapsearch

Process status

ps -ef | grep java

Change password for current user

passwd

Change password for user by using root account

sudo su
passwd someUser

Check if port 80 is open

netstat -tulpn | grep :80

Download web page

wget localhost:80/bugzilla

List hosts file

cat /etc/hosts

Copy file

cp [OPTION]... SOURCE... DIRECTORY
cp /wsdls/EID_Provision-V0.5.wsdl /var/opt/wsdls/EID_Provision-V0.5.wsdl

Delete file

rm fileName

Remove a directory and its contents without prompting you to make sure you want to delete each file in the directory.
rm -rf directory

Zip file

zip dest.zip sourceFile

The following command compresses the file archivefile1.txt and replaces it with the compressed version named "archivefile1.txt.bz2". bzip2 creates smaller files.
bzip2 archivefile1.txt

Read file/logs

[sudo] tail -100f /var/log/someLogFile.log

copy sourceFile.zip to another comp to user directory

 scp ./sourceFile.zip 10.200.0.133:./
(scp source_file_name username@destination_host:destination_folder)


Find 56952849307 that occured at 2015-02-06 10:2x in provisioning.log file
cat provisioning.log | grep "2015-02-06 10:2.*56952849307" | more
grep -A 3 "stringToFind" fileName   // show 3 lines after
grep -B 3 "stringToFind" fileName   // show 3 lines before
grep -C 3 "stringToFind" fileName   // show 3 lines around

Find 56952849307 in all files that begin with provisioning (e.g. provisioning.log.1)
ls provisioning* | xargs cat | grep 56952849307

Find USSD word in all provisioning.log files and show next 5 lines
cat /var/log/provisioning.log.* | grep MOVILB -A 5

grep all files in current directory for exact match:
grep -F "SIM card was deleted. MSISDN" *

dump tcp traffic to file
tcpdump -i any -w /tmp/test_001.pcap

ssh remote host identification has changed
ssh-keygen -R hostname

Change permission on folder
if needed switch to root user
$ sudo su
$ chmod -R 777 folderName

Ref:
15 Practical Grep Command Examples In Linux / UNIX

Unix Less Command: 10 Tips for Effective Navigation
How To Use Linux Screen

Maven notes

<!-- user defined properties in the pom.xml -->

 <properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  <jdk.version>1.8</jdk.version>
  <log4j.version>1.2.17</log4j.version>
</properties>

<dependencies>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.7</version>

</dependency>
</dependencies>

<build>

<plugins>

<!-- specify java version  -->

<plugin>

<groupId>org.apache.maven.plugins</groupId>

<artifactId>maven-compiler-plugin</artifactId>

<version>3.5.1</version>

<configuration>

<source>${jdk.version}</source>

<target>${jdk.version}</target>

</configuration>

</plugin>

<!--download sources and javadocs -->

<plugin>

<groupId>org.apache.maven.plugins</groupId>

<artifactId>maven-eclipse-plugin</artifactId>

<configuration>

<downloadSources>true</downloadSources>

<downloadJavadocs>true</downloadJavadocs>

</configuration>

</plugin>

<!-- create manifest file-->

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>hr.samara.mock.StartService</mainClass>
<classpathPrefix>dependency-jars/</classpathPrefix>
</manifest>
</archive>
</configuration>
</plugin>

<!-- copy dependency jars to dependency-jars folder-->

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/dependency-jars/</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>

</plugins>

<pluginManagement>
<plugins>

<!-- Ignore/Execute plugin execution -->

<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<!-- copy-dependency plugin -->
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<versionRange>[1.0.0,)</versionRange>
<goals>
<goal>copy-dependencies</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore />
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>

</build>

Install jar file to local repository

mvn install:install-file -Dfile=./mariadb-java-client-1.1.5.jar -DgroupId=org.mariadb.jdbc -DartifactId=mariadb-java-client -Dversion=1.1.5 -Dpackaging=jar

Resolving OutOfMemory Error

export MAVEN_OPTS="-Xmx1024m -XX:MaxPermSize=128m"

Ref: http://charithaka.blogspot.com/2008/09/how-to-avoid-outofmemory-error-when.html

Displays all dependencies that have newer versions available

$ mvn versions:display-dependency-updates


Ref:

how to create jar file with maven
what is pluginmanagement tag
instrict m2e to ignore plugin
Maven Properties guide

Javadoc tips

Referencing class: 

     {@link hr.samara.RadiusMessageResultEvent RadiusMessageResultEvent}

Referencing public static field: 

     {@link hr.samara.RadiusMessageResultEvent#EVENT_TYPE_ID EventType}

   * if class is within same package there is no need for naming package in link
     {@link RadiusMessageResultEvent}
   * second String is label

Ref:
http://docs.oracle.com/javase/7/docs/technotes/tools/windows/javadoc.html#link

Measuring time

How to measure time elapsed when invoking method or doing some processing.

long start = System.nanoTime();
sum_slow();
long end = System.nanoTime();
long diff = end - start;
System.out.println("Time: " + diff / 1000000000.0 + " seconds");
System.out.println("Time: " + TimeUnit.SECONDS.convert(diff, TimeUnit.NANOSECONDS) + " seconds");

Test:
Time: 18.596630883 seconds
Time: 18 seconds

Logging

log4j 1.2

Layouts:

#from mobicents-jainslee-2.7.0.FINAL-jboss-5.1.0.GA

%d{ABSOLUTE} %-5p [%c{1}] (%t) %m%n

21:47:59,146 WARN  [LogTest] (main) Sample warn message

%d [%t] %-5p %c - %m%n

2013-07-24 21:47:40,572 [main] WARN  org.mobicents.slee.test.LogTest - Sample warn message

# Pattern to output the caller's file name and line number.

%5p [%t] (%F:%L) - %m%n

 WARN [main] (LogTest.java:14) - Sample warn message

%d{ISO8601} [%t] %-5p (%F:%L) - %m%n 

 2013-07-24 21:55:03,407 [main] WARN  (LogTest.java:14) - Sample warn message

Appender's treshhold vs category

Treshhold is main filter, everything above Threshold value will go to appender. Then category can filter it further to priority's value.

In bellow example every logger in javax.slee.* package will be printed only if it is at least WARN level.

<appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">

<param name="Threshold" value="INFO"/>

...

</appender>

<category name="javax.slee">

<priority value="WARN" />

</category>

Ref:

https://logging.apache.org/log4j/1.2/manual.html

https://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/PatternLayout.html
https://docs.jboss.org/mobicents/jain-slee/2.7.0.FINAL/container/user-guide/en-US/html/logging_traces_and_alarms.html

10 Tips for Proper Application Logging

http://happygiraffe.net/blog/2008/09/03/logging-in-java/

Some examples
http://www.mkyong.com/logging/log4j-log4j-properties-examples/

Complete log4j.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">




<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/"

debug="true">




<appender name="consoleAppender" class="org.apache.log4j.ConsoleAppender">

<param name="Threshold" value="debug" />

<layout class="org.apache.log4j.PatternLayout">

<param name="ConversionPattern" value="%d [%t] %-5p (%F:%L) - %m%n"/>

</layout>

</appender>

<category name="org.mobicents" additivity="false">

<level value="warn" />

<appender-ref ref="consoleAppender" />

</category>

</log4j:configuration>