Welcome!

Weblogic Authors: Yeshim Deniz, Elizabeth White, Michael Meiner, Michael Bushong, Avi Rosenthal

Related Topics: Weblogic

Weblogic: Article

New Deployment Model in BEA WebLogic Server 7.0

New Deployment Model in BEA WebLogic Server 7.0

The release of BEA WebLogic Server 7.0 offered several new features such as Web services; a pluggable, flexible security infrastructure; a migratable framework; new developer tools; JMS; and a new deployment model to provide a highly reliable framework for scalable and secure applications.

In this article I'll talk about the deployment model introduced in WebLogic Server 7.0 and the different modes of application staging.

New Deployment Model
The new deployment model helps us prevent inconsistent deployment states across servers, especially clustered servers.

In previous versions of WebLogic Server, when an application was deployed, the admin server sent a copy of the application file(s) to all the targeted servers. The main problem with this approach is, if deployment of an application fails to any of these targeted servers, the entire deployment's state across its target servers became inconsistent. The second problem was, since the admin server copyied the files to managed servers upon their restart, server start-up was delayed as all the JSP's had to be compiled.

The new deployment model (aka "2 phase deployment protocol") was introduced to solve this problem in addition to maintaining domain consistency. In other words, this model ensures homogeneous application deployment in Clusters.

It also ensures better status reporting for success/failure of deployments. The WebLogic Server 6.x deployment style will continue to work as is; however, you are strongly encouraged to use the new deployment model as it is highly flexible and rich in terms of its new features:

  • Consistent deployment states for clusters: If an application targeted to a cluster fails on any of the cluster members in the prepare phase or in the activate phase, the application is not activated on any of the cluster members. This helps to ensure that the cluster is kept homogeneous.
  • Application ordering: At server startup, you set the order of application activations.
  • Improved API: A simple API separates configuration from the actual deployment operations. When a deployment is requested, this API will create the necessary configuration (MBeans) for you.
  • Deployment status: It is now easier to track the progress of a deployment, especially when it has multiple targets.

    Now let's talk about the phases in the new deployment model.

  • Prepare Phase (also known as first phase): The container prepares the application across all target servers. The container distributes or copies files and prepares the application and its components for activation, validating them and performing error checks on them. The purpose of the prepare phase is to ensure that the application and its components are in a state in which they can be reliably deployed.
  • Activation Phase (also known as second phase): The actual deployment of the application or activation is done in this phase. After it is completed, the application is made available to clients.

    If deployment of an application fails in either the prepare or activation phase, then the cluster deployment will fail. In the case of a non-cluster environment, the application won't be prepared or activated.

    Application Staging
    To efficiently support Content Management Providers, WebLogic Server 7.0 introduced several staging modes, described below.

    Nostage
    You do not need to copy application files to another location. A server in nostage mode will run applications deployed to it directly from their source directories. For example:

    java weblogic. Deployer url {admin-url}
    -username {admin-user} -activate -nostage
    -source c:/myapps/myapp.ear -targets managed-server1
    -password {admin-password}

    This command activates the EAR specified with the name myapp. The application is deployed to the targeted server, which in this case is called managed-server1.

    The -nostage option indicates that the application path "c:/myapps" is available on all of the servers in the domain and that it is not necessary to "stage" or transfer the files to the managed servers (e.g., shared file system).

    This staging mode may not be helpful if admin & managed servers are in different machines or in different Operating Systems.

    Stage
    The stage mode copies application files to servers targeted in deployment phase. This means that the application will automatically be copied to the staging directory on the server. The servers will initialize and run the application from this directory.

    java weblogic.Deployer url {admin-url} -username
    {admin-user} -password {admin-password} -activate -stage
    -source c:/myapps/myapp.ear -targets managed-server1

    This command activates the EAR specified with the name myapp. The application is deployed to the targeted server, which in this case is called managed-server1.

    The -stage option indicates that the application files are copied from -source directory to a directory with the application name under each target server's staging directory.

    External_stage
    The administrator manually copies files to the server's staging directory. In the external stage mode, the application will be run from a staging directory to which an external entity is expected to distribute the files. (e.g., CMP's)

    java weblogic.Deployer url {admin-url} -username {admin-user}
    -password {admin-password} -activate -external_stage
    -source C:/myapp/myapp.ear -targets managed-server1, managed-server2

    This command activates the EAR specified with the name myapp. The application is deployed to the targeted server, which in this case is called managed-server1.

    The -external_stage option indicates that the application files expect to be copied under each target server's staging directory.

    Default Staging modes
    For Admin servers, the default is "nostage". For Managed Servers, the default is "stage".

    The staging directory for each server is located under $WL_HOME/user_projects/mydomain/{server_name}/stage

    Available Deployment Tools for Two-Phase Deployment
    WebLogic Server 7.0 provides the following deployment tools to deploy applications using the two-phase deployment model:

    1. weblogic.Deployer command line utility
    2. WLS admin console
    3. WebLogic Builder
    4. Deployment via applications folder
    Conclusion
    In this article we looked at the new deployment model introduced in WebLogic Server 7.0, which ensures homogeneous deployments in a clustered environment. I hope this will help you choose the appropriate staging mode depending on your deployment needs.

    References

  • http://e-docs.bea.com/wls/docs70/programming/deploying.html
  • java weblogic. Deployer - examples: http://e-docs.bea.com/wls/docs70/faq/deploy.html#733195
  • More Stories By Kumar Allamraju

    Kumar Allamraju is a Sr. Developer Relations Engineer at BEA Systems in WebLogic server
    support division based in San Francisco. Kumar has 5 yrs of experience in object oriented
    programming and in J2EE related technologies. He has a Bachelors degree in Computer Science

    Comments (0)

    Share your thoughts on this story.

    Add your comment
    You must be signed in to add a comment. Sign-in | Register

    In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


    @ThingsExpo Stories
    In his session at 21st Cloud Expo, Carl J. Levine, Senior Technical Evangelist for NS1, will objectively discuss how DNS is used to solve Digital Transformation challenges in large SaaS applications, CDNs, AdTech platforms, and other demanding use cases. Carl J. Levine is the Senior Technical Evangelist for NS1. A veteran of the Internet Infrastructure space, he has over a decade of experience with startups, networking protocols and Internet infrastructure, combined with the unique ability to it...
    "There's plenty of bandwidth out there but it's never in the right place. So what Cedexis does is uses data to work out the best pathways to get data from the origin to the person who wants to get it," explained Simon Jones, Evangelist and Head of Marketing at Cedexis, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
    "Cloud Academy is an enterprise training platform for the cloud, specifically public clouds. We offer guided learning experiences on AWS, Azure, Google Cloud and all the surrounding methodologies and technologies that you need to know and your teams need to know in order to leverage the full benefits of the cloud," explained Alex Brower, VP of Marketing at Cloud Academy, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clar...
    Large industrial manufacturing organizations are adopting the agile principles of cloud software companies. The industrial manufacturing development process has not scaled over time. Now that design CAD teams are geographically distributed, centralizing their work is key. With large multi-gigabyte projects, outdated tools have stifled industrial team agility, time-to-market milestones, and impacted P&L stakeholders.
    Gemini is Yahoo’s native and search advertising platform. To ensure the quality of a complex distributed system that spans multiple products and components and across various desktop websites and mobile app and web experiences – both Yahoo owned and operated and third-party syndication (supply), with complex interaction with more than a billion users and numerous advertisers globally (demand) – it becomes imperative to automate a set of end-to-end tests 24x7 to detect bugs and regression. In th...
    "Akvelon is a software development company and we also provide consultancy services to folks who are looking to scale or accelerate their engineering roadmaps," explained Jeremiah Mothersell, Marketing Manager at Akvelon, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
    "MobiDev is a software development company and we do complex, custom software development for everybody from entrepreneurs to large enterprises," explained Alan Winters, U.S. Head of Business Development at MobiDev, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
    SYS-CON Events announced today that CrowdReviews.com has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5–7, 2018, at the Javits Center in New York City, NY. CrowdReviews.com is a transparent online platform for determining which products and services are the best based on the opinion of the crowd. The crowd consists of Internet users that have experienced products and services first-hand and have an interest in letting other potential buye...
    "IBM is really all in on blockchain. We take a look at sort of the history of blockchain ledger technologies. It started out with bitcoin, Ethereum, and IBM evaluated these particular blockchain technologies and found they were anonymous and permissionless and that many companies were looking for permissioned blockchain," stated René Bostic, Technical VP of the IBM Cloud Unit in North America, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Conventi...
    SYS-CON Events announced today that Telecom Reseller has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. Telecom Reseller reports on Unified Communications, UCaaS, BPaaS for enterprise and SMBs. They report extensively on both customer premises based solutions such as IP-PBX as well as cloud based and hosted platforms.
    "Space Monkey by Vivent Smart Home is a product that is a distributed cloud-based edge storage network. Vivent Smart Home, our parent company, is a smart home provider that places a lot of hard drives across homes in North America," explained JT Olds, Director of Engineering, and Brandon Crowfeather, Product Manager, at Vivint Smart Home, in this SYS-CON.tv interview at @ThingsExpo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
    Coca-Cola’s Google powered digital signage system lays the groundwork for a more valuable connection between Coke and its customers. Digital signs pair software with high-resolution displays so that a message can be changed instantly based on what the operator wants to communicate or sell. In their Day 3 Keynote at 21st Cloud Expo, Greg Chambers, Global Group Director, Digital Innovation, Coca-Cola, and Vidya Nagarajan, a Senior Product Manager at Google, discussed how from store operations and ...
    It is of utmost importance for the future success of WebRTC to ensure that interoperability is operational between web browsers and any WebRTC-compliant client. To be guaranteed as operational and effective, interoperability must be tested extensively by establishing WebRTC data and media connections between different web browsers running on different devices and operating systems. In his session at WebRTC Summit at @ThingsExpo, Dr. Alex Gouaillard, CEO and Founder of CoSMo Software, presented ...
    WebRTC is great technology to build your own communication tools. It will be even more exciting experience it with advanced devices, such as a 360 Camera, 360 microphone, and a depth sensor camera. In his session at @ThingsExpo, Masashi Ganeko, a manager at INFOCOM Corporation, introduced two experimental projects from his team and what they learned from them. "Shotoku Tamago" uses the robot audition software HARK to track speakers in 360 video of a remote party. "Virtual Teleport" uses a multip...
    A strange thing is happening along the way to the Internet of Things, namely far too many devices to work with and manage. It has become clear that we'll need much higher efficiency user experiences that can allow us to more easily and scalably work with the thousands of devices that will soon be in each of our lives. Enter the conversational interface revolution, combining bots we can literally talk with, gesture to, and even direct with our thoughts, with embedded artificial intelligence, whic...
    SYS-CON Events announced today that Evatronix will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Evatronix SA offers comprehensive solutions in the design and implementation of electronic systems, in CAD / CAM deployment, and also is a designer and manufacturer of advanced 3D scanners for professional applications.
    Leading companies, from the Global Fortune 500 to the smallest companies, are adopting hybrid cloud as the path to business advantage. Hybrid cloud depends on cloud services and on-premises infrastructure working in unison. Successful implementations require new levels of data mobility, enabled by an automated and seamless flow across on-premises and cloud resources. In his general session at 21st Cloud Expo, Greg Tevis, an IBM Storage Software Technical Strategist and Customer Solution Architec...
    To get the most out of their data, successful companies are not focusing on queries and data lakes, they are actively integrating analytics into their operations with a data-first application development approach. Real-time adjustments to improve revenues, reduce costs, or mitigate risk rely on applications that minimize latency on a variety of data sources. In his session at @BigDataExpo, Jack Norris, Senior Vice President, Data and Applications at MapR Technologies, reviewed best practices to ...
    An increasing number of companies are creating products that combine data with analytical capabilities. Running interactive queries on Big Data requires complex architectures to store and query data effectively, typically involving data streams, an choosing efficient file format/database and multiple independent systems that are tied together through custom-engineered pipelines. In his session at @BigDataExpo at @ThingsExpo, Tomer Levi, a senior software engineer at Intel’s Advanced Analytics gr...
    When talking IoT we often focus on the devices, the sensors, the hardware itself. The new smart appliances, the new smart or self-driving cars (which are amalgamations of many ‘things’). When we are looking at the world of IoT, we should take a step back, look at the big picture. What value are these devices providing? IoT is not about the devices, it’s about the data consumed and generated. The devices are tools, mechanisms, conduits. In his session at Internet of Things at Cloud Expo | DXWor...