Liferay 7.3: Create custom database services (service-builder)

STEP 1:

Open the IDE. Goto File -> New -> Liferay Module Project


Select `service-builder` as Template

Click Next. Provide the package name and click finish

After that you can see two folders are created (*-api and *-service) inside your workspace.

And three folders in the IDE

Open siteService-service and click on service.xml . Click on the Entities and delete the default Foo column

And then add the Entity named Site . It is just an Entity, that connects to the table.

Click on the Site Entity and provide the table name

Add the Table Name

Add the columns as many as you want.

Select the column type from here:

Click on the Source Tab and you can see in the service.xml details of all columns that added.

Double click on the buildService to build the new service and double click on the deploy to deploy the service.

Now click on the down arrow and gradle -> refresh project. You can see the bundles created.

And the .jar bundles inside the osgi modules

Copy this *-api.jar file into the deploy folder of the server.

~/liferay-ce-portal-tomcat-7.3.0-ga1-20200127150653953/liferay-ce-portal-7.3.0-ga1/deploy

and then copy the *-service.jar into the same folder

You can see these are processing and started in the server logs.

INFO  [com.liferay.portal.kernel.deploy.auto.AutoDeployScanner][AutoDeployDir:263] Processing sitesService.api.jar

~/liferay-ce-portal-tomcat-7.3.0-ga1-20200127150653953/liferay-ce-portal-7.3.0-ga1/osgi/modules][BundleStartStopLogger:39] STARTED sitesService.api_1.0.0 [1115]

[com.liferay.portal.kernel.deploy.auto.AutoDeployScanner][AutoDeployDir:263] Processing sitesService.service.jar

~/liferay-ce-portal-tomcat-7.3.0-ga1-20200127150653953/liferay-ce-portal-7.3.0-ga1/osgi/modules][BundleStartStopLogger:39] STARTED sitesService.service_1.0.0 [1116]


Now check the database, if the Site_ table with all columns are created or not

You can see the table and columns are created. In the next topic we discuss about adding services to this service builder.

Backup your system databases using Ruby backup gem

Install RVM (Or Rbenv) to manage your Ruby versions

 $ gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
 $ curl -sSL https://get.rvm.io | bash 

Restart Terminal and type rvm -v

 $ rvm install 2.5
 $ rvm gemset create backup
 $ rvm gemset use backup
 $ gem install backup
 $ backup generate:model --trigger project_2_backup --archives --storages='s3' --compressor='gzip' --notifiers='mail' 
 Generated configuration file: '/home/ubuntu/Backup/config.rb'.
 Generated model file: '/home/ubuntu/Backup/models/project_2_backup.rb'.
 Usage:
   backup generate:model --trigger=TRIGGER
 Options:
   --trigger=TRIGGER
   [--config-path=CONFIG_PATH]  # Path to your Backup configuration directory
   [--databases=DATABASES]      # (mongodb, mysql, postgresql, redis, riak)
   [--storages=STORAGES]        # (cloudfiles, dropbox, ftp, local, ninefold, rsync, s3, scp, sftp)
   [--syncers=SYNCERS]          # (cloud_files, rsync_local, rsync_pull, rsync_push, s3)
   [--encryptors=ENCRYPTORS]    # (gpg, openssl)
   [--compressors=COMPRESSORS]  # (bzip2, gzip, lzma, pbzip2)
   [--notifiers=NOTIFIERS]      # (campfire, hipchat, mail, presently, prowl, twitter)
   [--archives]
   [--splitter]                 # use `--no-splitter` to disable
                               # Default: true 

Sample Model File

Add the following conf in Backup/models/project_2_backup.rb:

Example for mongodb

 database MongoDB do |db|
     db.name               = "db_name"
     db.username           = "db_username"
     db.password           = "db_pswd"
     db.host               = "localhost"
     db.port               = 27017 
     db.ipv6               = false
     #db.only_collections   = ["only", "these", "collections"]
     db.additional_options = ['--authenticationDatabase=admin']
     db.lock               = false
     db.oplog              = false
   end
   ## 
   # Amazon Simple Storage Service [Storage]
   #
   store_with S3 do |s3|
     # AWS Credentials
     s3.access_key_id     = "YOUR_ACCESS_KEY"
     s3.secret_access_key = "YOUR_SECRET_KEY"
     # Or, to use a IAM Profile:
     # s3.use_iam_profile = true
     s3.region            = "ap-southeast-2" 
     s3.bucket            = "bucket_name"
     s3.path              = "bucket_name_path"
     s3.keep              = 12
     # s3.keep              = Time.now - 2592000 # Remove all backups older than 1 month.
   end 

 # Notification mail infos
 notify_by Mail do |mail|
     mail.on_success           = true
     mail.on_warning           = true
     mail.on_failure           = true
     mail.from                 = "_____@gmail.com"
     mail.to                   = "____@___.com"
     mail.cc                   = "______@_____.com, _____@______.com"
     #mail.bcc                  = "bcc@email.com"
     #mail.reply_to             = "reply_to@email.com" 
     mail.address              = "smtp.gmail.com"
     mail.port                 = 587
     mail.domain               = "domain_name"
     mail.user_name            = "email_username"
     mail.password             = "email_password"
     mail.authentication       = "plain"
     mail.encryption           = :starttls
 end 

Once you’ve setup your configuration, check your work with:

$ backup check

If there are no errors, the check should report:

[2019/03/28 10:02:26][info] Configuration Check Succeeded.

Perform Backup:

$ backup perform --trigger project_2_backup

The Keep Option

keep a specified number of backups in storage. After each backup is performed, it will remove older backup package files based on the keep setting.

keep as a Number

If a number has been specified and once the keep limit has been reached, the oldest backup will be removed.

Note that if keep is set to 5, then the 6th backup will be transferred and stored, before the oldest is removed. So be sure you have space available for keep + 1 backups

keep as Time

When a Time object is set to keep it will keep backups until that time. Everything older than the set time will be removed.

How to reinstall mongodb in ubuntu linux

Before reinstalling mongodb, in your linux system check whats installed in the system

 $ sudo dpkg -l | grep mongo
 ii  mongodb-org                              2.6.3                                       amd64        MongoDB open source document-oriented database system (metapackage)
 ii  mongodb-org-mongos                       2.6.3                                       amd64        MongoDB sharded cluster query router
 ii  mongodb-org-server                       2.6.3                                       amd64        MongoDB database server
 ii  mongodb-org-shell                        2.6.3                                       amd64        MongoDB shell client
 ii  mongodb-org-tools                        2.6.3                                       amd64        MongoDB tools

Remove all
$ sudo apt-get remove mongodb*

Install mongodb again, check mongodb org

$ sudo apt-get install -y mongodb-org

For particular version

$ sudo apt-get install -y mongodb-org=2.6.5 mongodb-org-server=2.6.5 mongodb-org-shell=2.6.5 mongodb-org-mongos=2.6.5 mongodb-org-tools=2.6.5


check whats newly installed

$ sudo dpkg -l | grep mongo
 ii  mongodb-org                              2.6.8                                       amd64        MongoDB open source document-oriented database system (metapackage)
 ii  mongodb-org-mongos                       2.6.8                                       amd64        MongoDB sharded cluster query router
 ii  mongodb-org-server                       2.6.8                                       amd64        MongoDB database server
 ii  mongodb-org-shell                        2.6.8                                       amd64        MongoDB shell client
 ii  mongodb-org-tools                        2.6.8                                       amd64        MongoDB tools

check mongodb server status

$ sudo service mongod status

Start mongodb server

$ sudo service mongod start

Start mongo shell

$ mongo

check mongodb log file here

 $ tail -n 200 /var/log/mongodb/mongod.log