Apache Tomcat 9 Configuration Reference (9.0.37) - The Service Component
Author: Craig R. McClanahan

## The Service Component

### Table of Contents

- Introduction
- Attributes
  1. Common Attributes
  2. Standard Implementation
- Nested Components
- Special Features

### Introduction

A Service element represents the combination of one or more Connector components that share a single Engine component for processing incoming requests. One or more Service elements may be nested inside a Server element.

### Attributes

#### Common Attributes

All implementations of Service support the following attributes:

Attribute | Description
--- | ---
`className` | Java class name of the implementation to use. This class must implement the `org.apache.catalina.Service` interface. If no class name is specified, the standard implementation will be used.
`name` | The display name of this Service, which will be included in log messages if you utilize standard Catalina components. The name of each Service that is associated with a particular Server must be unique.

#### Standard Implementation

The standard implementation of Service is org.apache.catalina.core.StandardService. It supports the following additional attributes (in addition to the common attributes listed above):

Attribute | Description
--- | ---

### Nested Components

The only components that may be nested inside a Service element are one or more Connector elements, followed by exactly one Engine element.

### Special Features

There are no special features associated with a Service.