spring的FactoryBean机制

spring可以通过的FactoryBean的形式把一个Factory整合到spring中。比如solr的客户端CommonsHttpSolrServer:

	CommonsHttpSolrServer server = new CommonsHttpSolrServer("http://192.168.1.100:7100/solr/feed");
		server.setSoTimeout(1000);
		server.setConnectionTimeout(100);
		server.setDefaultMaxConnectionsPerHost(100);
		server.setMaxTotalConnections(100);
		server.setAllowCompression(true);
		server.setParser(new XMLResponseParser());

 我模仿SqlMapClientFactoryBean的方式来实现一个solr的FactoryBean

public class SolrServerFactoryBean implements FactoryBean<CommonsHttpSolrServer>, InitializingBean {

	private CommonsHttpSolrServer solrServer; // http://192.168.1.100:7100/solr/feed

	private String solrServerUrl;

	private int soTimeout; // socket read timeout

	private int connectionTimeout;

	private int defaultMaxConnectionsPerHost;

	private int maxTotalConnections;

	@Override
	public void afterPropertiesSet() throws Exception {
		solrServer = new CommonsHttpSolrServer(solrServerUrl);
		solrServer.setAllowCompression(true);
		solrServer.setSoTimeout(soTimeout);
		solrServer.setConnectionTimeout(connectionTimeout);
		solrServer.setDefaultMaxConnectionsPerHost(defaultMaxConnectionsPerHost);
		solrServer.setMaxTotalConnections(maxTotalConnections);
	}

	@Override
	public CommonsHttpSolrServer getObject() throws Exception {
		return solrServer;
	}

	@Override
	public Class<?> getObjectType() {
		return (this.solrServer != null ? this.solrServer.getClass() : CommonsHttpSolrServer.class);
	}

	@Override
	public boolean isSingleton() {
		return true;
	}
	

	public void setSolrServerUrl(String solrServerUrl) {
		this.solrServerUrl = solrServerUrl;
	}

	public void setSoTimeout(int soTimeout) {
		this.soTimeout = soTimeout;
	}

	public void setConnectionTimeout(int connectionTimeout) {
		this.connectionTimeout = connectionTimeout;
	}

	public void setMaxTotalConnections(int maxTotalConnections) {
		this.maxTotalConnections = maxTotalConnections;
	}

	public void setDefaultMaxConnectionsPerHost(int defaultMaxConnectionsPerHost) {
		this.defaultMaxConnectionsPerHost = defaultMaxConnectionsPerHost;
	}
}

 

配置文件：

    <bean id="solrServer" class="com.duitang.search.core.SolrServerFactoryBean">
    	<property name="solrServerUrl" 					value="${solrServerUrl}"></property>
    	<property name="soTimeout" 						value="1000"></property>
    	<property name="connectionTimeout" 				value="100"></property>
    	<property name="defaultMaxConnectionsPerHost" 	value="32"></property>
    	<property name="maxTotalConnections" 			value="128"></property>
    </bean>

这里solrServerUrl是通过<context:property-placeholder location="/WEB-INF/*.properties"/>替换的