Lawrence Kaye

Welcome to the first issue of BEA WebLogic Developer's Journal! This article is the first of a three-part series geared around the clustering capabilities of BEA WebLogic Server (WLS) 6.1 and aimed at introductory and advanced audiences. This article will talk about the importance of clustering and the high-level clustering capabilities of WLS, provide an in-depth analysis of HttpSession clustering and persistence, discuss basic configuration and trouble shooting, and provide an example that ties together everything discussed in this article. The second article will provide an in-depth analysis of replica-aware stubs, their impact on a clustered system, and how they are used with EJBs, JMS objects, and DataSource objects. The last article will discuss clustering best practices, including the single-tier, coupled model; multi-tiered, coupled model; and the multi-tier... (more)

An Introduction to WebLogic Server Clustering

This is the second in a series of three articles discussing the clustering capabilities of BEA WebLogic Server 6.1 (WLS). This month we discuss replica-aware stubs, their impact on a clustered system, and how they're used with EJBs. How WebLogic Can Instrument EJBs WebLogic can provide clustering logic for an EJB in four possible locations (see Figure 1): The JNDI naming server, where the home stub is bound The container The home stub The remote stub The home stub and the remote stub are the most interesting aspects, since both of these objects are downloaded by a Java client and... (more)