Oracle Coherence 12c教程：基础创建与部署指南

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Oracle® Fusion Middleware Tutorial for Oracle Coherence 12c (12.1.2) 是一份针对开发人员和架构师的专业教程，它提供了详细的步骤指南，涵盖了如何创建、配置和部署基于Oracle Coherence的Java应用程序。这份文档是Oracle官方发布，版权归Oracle及其关联公司所有，未经许可，用户不得擅自使用、复制、修改或分发。该教程的核心内容主要包括以下几个方面： 1. **Oracle Coherence基础知识**：首先介绍了Oracle Coherence的基本概念，包括其在Oracle Fusion Middleware架构中的角色，以及作为分布式内存平台的重要功能，如数据共享、高可用性和可扩展性。 2. **环境设置与配置**：教程指导读者如何安装和配置Oracle Coherence组件，包括设置集群、数据仓库和安全设置，确保在不同环境中运行Java应用时的稳定性和性能。 3. **示例与实践**：通过一系列实战示例，演示了如何在实际项目中应用Oracle Coherence，例如构建缓存解决方案、实现消息传递系统，以及优化分布式计算任务的执行。 4. **应用开发流程**：涵盖了从编写客户端代码到与Coherence集成的详细步骤，包括如何设计和实现高效的分布式数据结构，以及处理跨节点通信和一致性问题。 5. **部署与管理**：讨论了应用程序的部署策略，包括部署脚本、监控工具的使用，以及故障排除和维护的最佳实践。 6. **许可证与法律限制**：强调了软件使用和分发的法律限制，特别是关于反向工程、解码和编译的要求，确保用户遵守协议规定。 7. **作者贡献**：教程由多位经验丰富的作者共同完成，他们来自Oracle内部，确保了内容的专业性和深度，反映了最新的技术趋势和最佳实践。 Oracle Fusion Middleware Tutorial for Oracle Coherence 12c (12.1.2) 是一个全面的资源，旨在帮助开发人员和架构师充分利用Oracle Coherence平台，提升Java应用的性能和分布式处理能力。无论是初次接触Oracle Coherence，还是希望深入了解和升级技能的开发者，都可在阅读这份教程后受益匪浅。

xvi

■ Oracle Fusion Middleware Administering Oracle Coherence

■ Oracle Fusion Middleware Securing Oracle Coherence

■ Oracle Fusion Middleware Developing Oracle Coherence Applications for Oracle

WebLogic Server

■ Oracle Fusion Middleware Java API Reference for Oracle Coherence

■ Oracle Fusion Middleware .NET API Reference for Oracle Coherence

■ Oracle Fusion Middleware C++ API Reference for Oracle Coherence

Conventions

The following text conventions are used in this tutorial:

Convention Meaning

boldface Boldface type indicates graphical user interface elements associated

with an action, or terms defined in text or the glossary.

italic Italic type indicates book titles, emphasis, or placeholder variables for

which you supply particular values.

monospace Monospace type indicates commands within a paragraph, URLs, code

in examples, text that appears on the screen, or text that you enter.

Testing a Coherence Installation

1-2 Oracle Fusion Middleware Tutorial for Oracle Coherence

■ lib, which contains the required library files

Testing a Coherence Installation

In this exercise, you test whether your Coherence installation can cluster Java

processes. This ensures that Coherence-based applications that ship with Coherence

will run as expected. If Coherence is not capable of clustering on a single machine,

then you must reconfigure your network and firewall settings.

To complete this exercise, you must have Coherence (Java Edition) 12c (12.1.2)

installed. See "Installing Coherence" on page 1-1 for more information.

Coherence uses a variety of network addresses and ports to enable communication

between clustered processes. If these addresses and ports are unavailable due to other

applications using them, or because of a firewall, then Coherence may be unreliable,

may fail to cluster, or may not work at all. By default, Coherence assumes that the

network addresses and ports listed in Table 1–1 are available:

Coherence ships with two simple command-line (shell-based) applications that can be

used to determine whether Coherence operates correctly.

■ The cache server is a simple application that hosts and manages data on behalf of

other applications in a cluster.

■ The cache client is a simple application that enables a developer to access, process,

and update cached data within a cluster. It also provides information about the

cluster. By executing these applications either on a single host or on several hosts,

you can determine whether Coherence is operating correctly locally or across a

network.

When an application uses Coherence as shipped, objects placed into Coherence

caches are typically stored and managed in-process within the application.

However, to increase object availability, Coherence can manage objects in memory

but out of the application process. This enables objects to survive possible

application outages (either deliberate or accidental). To manage objects in this

way, Coherence uses cache servers. The purpose of a Coherence cache server is to

Table 1–1 Network Addresses and Ports Used by Coherence

Address / Port / Type Purpose

224.version / version / Multicast Cluster member discovery and broadcast. The variable

version represents the release version of Coherence. For

example, the multicast address for the 12.1.2 release is

224.12.1.0. The port number also reflects the release

version. For example, for the 12.1.2 release, the port

number is 12100. Designing the address in this way

ensures that different versions of Coherence do not

cluster with each other by default.

localhost / 8088+ / Unicast Interprocess communication between cluster members.

(localhost is the local IP address and not the loop

back address.)

localhost / 8089 / Unicast An additional port that is used for unicast

communication. By default, the port is assigned as the

next available port after the first unicast port.

localhost / 7 / Unicast The default port of the IpMonitor component that is

used for detecting hardware failure of cluster members

is "7".

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