嵌入式tomcat服务代码实现

嵌入式

嵌入式tomcat服务代码实现

2019-07-13 01:13发布生成海报

站内文章 / 嵌入式Linux

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package com.variflight.data.analysis.entity.web.server;

import java.io.File;

import javax.servlet.ServletException;

import org.apache.catalina.LifecycleException;
import org.apache.catalina.connector.Connector;
import org.apache.catalina.startup.Tomcat;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.lang3.StringUtils;

/**
 * @author sunli
 */
public class TomcatHttpServer {
	private static Tomcat tomcat;

	public static class Builder {
		private String context = "";
		private String webapp = "";
		private String baseDir = new File(System.getProperty("java.io.tmpdir")).getAbsolutePath();
		private int port = 8080;
		private String protocol = "org.apache.coyote.http11.Http11NioProtocol";
		private int maxThreads = 100;
		private int maxConnections = 100;
		private int connectionTimeout = 60000;
		private String uriEncoding = "UTF-8";
		private int maxKeepAliveRequests = -1;

		public String getBaseDir() {
			return baseDir;
		}

		public Builder setBaseDir(String baseDir) {
			this.baseDir = baseDir;
			return this;
		}

		public int getPort() {
			return port;
		}

		public Builder setPort(int port) {
			this.port = port;
			return this;
		}

		public String getProtocol() {
			return protocol;
		}

		public Builder setProtocol(String protocol) {
			this.protocol = protocol;
			return this;
		}

		public int getMaxThreads() {
			return maxThreads;
		}

		public Builder setMaxThreads(int maxThreads) {
			this.maxThreads = maxThreads;
			return this;
		}

		public int getMaxConnections() {
			return maxConnections;
		}

		public Builder setMaxConnections(int maxConnections) {
			this.maxConnections = maxConnections;
			return this;
		}

		public int getConnectionTimeout() {
			return connectionTimeout;
		}

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

		public String getUriEncoding() {
			return uriEncoding;
		}

		public Builder setUriEncoding(String uriEncoding) {
			this.uriEncoding = uriEncoding;
			return this;
		}

		public int getMaxKeepAliveRequests() {
			return maxKeepAliveRequests;
		}

		public Builder setMaxKeepAliveRequests(int maxKeepAliveRequests) {
			this.maxKeepAliveRequests = maxKeepAliveRequests;
			return this;
		}

		public String getContext() {
			return context;
		}

		public Builder setContext(String context) {
			this.context = context;
			return this;
		}

		public String getWebapp() {
			return webapp;
		}

		public Builder setWebapp(String webapp) {
			this.webapp = webapp;
			return this;
		}

		public TomcatHttpServer build() {
			if (StringUtils.isBlank(context)) {
				throw new IllegalArgumentException("context not set!");
			}
			if (StringUtils.isBlank(webapp)) {
				throw new IllegalArgumentException("webapp directory not set!");
			}
			File web = new File(webapp);
			if (!web.isDirectory()) {
				throw new IllegalArgumentException("webapp is not directory!");
			}
			if (!web.exists()) {
				throw new IllegalArgumentException("webapp directory not exists!");
			}
			return new TomcatHttpServer(this);
		}
	}

	public TomcatHttpServer(Builder builder) {
		tomcat = new Tomcat();
		// tomcat.getHost().setDeployOnStartup(true);
		// 设置appbase则会将该目录下的所有web应用进行管理，并且通过设置自动发布从而会实现自动解压war
		// tomcat.getHost().setAppBase(WORKSPACE);
		// tomat work目录 可设置成tmp目录
		tomcat.setBaseDir(FilenameUtils.concat(builder.getBaseDir(), String.valueOf(builder.getPort())));
		// tomcat.setHostname(ip);

		// tomcat.enableNaming();
		Connector connector = new Connector(builder.getProtocol());
		connector.setPort(builder.getPort());
		connector.setProperty("maxThreads", String.valueOf(builder.getMaxThreads()));
		connector.setProperty("maxConnections", String.valueOf(builder.getMaxConnections()));

		connector.setProperty("connectionTimeout", String.valueOf(builder.getConnectionTimeout()));
		connector.setURIEncoding(builder.getUriEncoding())

                connector.setProperty("maxKeepAliveRequests", String.valueOf(builder.getMaxKeepAliveRequests()));
		tomcat.getService().addConnector(connector);
		tomcat.setConnector(connector);

		try {
			tomcat.addWebapp(builder.getContext(), builder.getWebapp());
		} catch (ServletException e) {
			throw new IllegalStateException("init server", e);
		}
	}

	public void startup() {
		try {
			tomcat.start();
		} catch (LifecycleException e) {
			throw new IllegalStateException("Failed to start tomcat server", e);
		}
	}

}

调用：

package com.variflight.data.analysis.entity.web.server;

import java.io.File;
import java.io.IOException;
import java.util.Properties;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.core.io.support.PropertiesLoaderUtils;

/**
 * EntityWebServer
 * @author sunli
 */
public class EntityWebServer {
	private static Log logger = LogFactory.getLog(EntityWebServer.class);

	public static void main(String[] args) throws InterruptedException, IOException {

		startTomcat();

		System.out.println("EntityWebServer is running!");
		logger.info("EntityWebServer is running!");

		synchronized (EntityWebServer.class) {
			try {
				EntityWebServer.class.wait();
			} catch (Throwable e) {
				System.exit(1);
			}
		}

	}

	private static void startTomcat() throws IOException {
		Properties config = PropertiesLoaderUtils.loadAllProperties("config.properties");
		int port = Integer.parseInt(getProperty(config, "ENTITY.WEB.PORT"));
		String context = getProperty(config, "ENTITY.WEB.CONTEXT");
		if (!context.startsWith("/")) {
			context = "/" + context;
		}
		String webapp = new File(getProperty(config, "ENTITY.WEB.APP")).getAbsolutePath();
		new TomcatHttpServer.Builder().setPort(port).setContext(context).setWebapp(webapp).build().startup();
	}

	private static String getProperty(Properties config, String propertyName) {
		String propertyValue = config.getProperty(propertyName);
		if (StringUtils.isBlank(propertyValue)) {
			throw new IllegalArgumentException("property: " + propertyName + " not set!");
		}
		return propertyValue;
	}
}

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