securityimpl.java

本书通过实例介绍了嵌入式编程的方法与技巧书中例子具有实用性

import java.net.*;
import java.util.*;
import java.io.*;
import java.sql.*;
import hp.chaiserver.*;

public class SecurityImpl implements ISecurity, hp.chaiserver.IChaiServer
{
	Environment env1;
	public void initWorkerArgs(String name, IDaemon daemon, ArgVector args) {
	}
	Thread thread;
	// securityRun is an implementation of the method defined in ISecurity
	public void securityRun(String retFormat, ArgVector args, Environment env) {
		// The next two lines obtain utility objects from the environment
		// retStat is used to return status information
		// html is used to stream HTML data back to client
		HTMLStatus retStat = env.getErrResponder();
		HTMLHelperBase html = (HTMLHelperBase) env.getHTMLHelper();

		try {
		// Replace the following three lines of code with your implementation
			html.sendDataHeader("ChaiServer Object", null);
			html.sendData("<P>securityRun called");
			html.sendDataFooter();
		} catch (Exception exe) {
			Daemon.out.println("Exception thrown by HtmlHelper" + exe);
		}
	}

	// homePage is an implementation of a method declared in hp.chaiserver.IChaiServer
	public void homePage(OutputStream out, Environment env) {
		// get HTMLHelperBase object from Environment. Used for streaming HTML
	 HTMLHelper html = (HTMLHelper) env.getHTMLHelper();
	 try {
	        //html.startHTMLDoc();
	        html.startHTMLMetaDoc("content=\"10\"");
	        // send <CENTER> Tag
	        html.startTag("CENTER");
	        // send Heading String
	        html.appendSimpleHTMLPara("Security Application", "H1");
	        // send </CENTER> Tag
	        html.endTag("CENTER");
	        // send <HR> Tag
	        html.startTag("HR");
	  		try{
	    		java.sql.Connection conn,conn1;
	    		Statement st,st1;
				ResultSet rs,rs1;
				String ctime1,ptime1;
				int ct1,ct2,ct3,ct4,pt1,pt2,pt3,pt4,dt1,dt2,dt3,dt4;
				pt1=pt2=pt3=pt4=0;
				ct1=ct2=ct3=ct4=0;
				dt1=dt2=dt3=dt4=0;
				////******       ******/////
				Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
				conn = DriverManager.getConnection("jdbc:odbc:test2000");
				st = conn.createStatement();
				rs = st.executeQuery("select * from security where slno = (select count(*) from security)");
				while(rs.next())
				{
	 			  ctime1 = rs.getString(2);
	 			  ct1 = rs.getInt(3);
	 			  ct2 = rs.getInt(4);
	 			  ct3 = rs.getInt(5);
	 			  ct4 = rs.getInt(6);
	 			  System.out.println("CTime "+ctime1+"CT1 "+ct1+"CT2 "+ct2+"CT3 "+ct3+"CT4 "+ct4);
	 			  html.appendSimpleHTMLPara("Current values:","H2");
	 			  html.appendSimpleHTMLPara("Time "+ctime1+" Temp1: "+ct1+" Temp2: "+ct2+" Temp3: "+ct3+" Temp4: "+ct4, "H3");
	 		    }
				conn1 = DriverManager.getConnection("jdbc:odbc:test2000");
				st1 = conn1.createStatement();
				rs1 = st1.executeQuery("select * from security where slno = (select count(*)-1 from security)");
				while(rs1.next())
				{
	 			  ptime1 = rs1.getString(2);
	 			  pt1 = rs1.getInt(3);
	 			  pt2 = rs1.getInt(4);
	 			  pt3 = rs1.getInt(5);
	 			  pt4 = rs1.getInt(6);
	 			  System.out.println("PTime "+ptime1+"PT1 "+pt1+"PT2 "+pt2+"PT3 "+pt3+"PT4 "+pt4);
	 			  html.appendSimpleHTMLPara("Previous values:","H2");
	 			  html.appendSimpleHTMLPara("Time: "+ptime1+" Temp1: "+pt1+" Temp2: "+pt2+" Temp3: "+pt3+" Temp4: "+pt4, "H3");
	 		    }
				dt1 = ct1 - pt1;
				dt2 = ct2 - pt2;
				dt3 = ct3 - pt3;
				dt4 = ct4 - pt4;
				if(dt1 < 0){
				   dt1 = -dt1;
			 	}
				if(dt2 < 0){
				   dt2 = -dt2;
				}
				if(dt3 < 0){
				   dt3 = -dt3;
				}
				if(dt4 < 0){
				   dt4 = -dt4;
				}
				if(dt1 > 5){
					System.out.println("Fluctuation in Temperature1: "+dt1);
					html.appendSimpleHTMLPara("Fluctuation in Temperature1: "+dt1, "H3");
				}
				if(dt2 > 5){
					System.out.println("Fluctuation in Temperature2: "+dt2);
					html.appendSimpleHTMLPara("Fluctuation in Temperature2: "+dt2, "H3");
				}
				if(dt3 > 5){
					System.out.println("Fluctuation in Temperature3: "+dt3);
					html.appendSimpleHTMLPara("Fluctuation in Temperature3: "+dt3, "H3");
				}
				if(dt4 > 5){
					System.out.println("Fluctuation in Temperature4: "+dt4);
					html.appendSimpleHTMLPara("Fluctuation in Temperature4: "+dt4, "H3");
				}
				rs.close();
				rs1.close();
				st.close();
				st1.close();
				conn.close();
				conn1.close();
			////******       *****/////
       		}catch(Exception e) {   }

	       // send <P> Tag
	       html.startNewHTMLParagraph();
	       // send <HR> Tag
	       html.startTag("HR");
	       // send a sequence of Tags for a link to
	       // the home page of the local server

	   	   html.sendHomeLink(); // send end of document Tags
		   html.endHTMLDoc();
        }catch (IOException io){}
	}

	// exportMethods is an implementation of a method declared in hp.chaiserver.IChaiServer
	public void exportMethods(OutputStream out, String str, Environment env) {
		// If you don't want to implement this Method, use the next three lines of code
		// HTMLStatus retStat = env.getErrResponder();
		// retStat.sendError(400,"The exportMethods Property is not supported");
		// return;

		// Otherwise at least return the name of all methods
		HTMLHelperBase html = (HTMLHelperBase) env.getHTMLHelper();
		// send HTML document header
		try {
			html.sendDataHeader("ChaiServer Object", null);
			html.sendData("<P>ISecurity has the following methods:<P>");
			html.sendData("<P>securityRun");
			html.sendDataFooter();
		} catch (Exception exe) {
			Daemon.out.println("Exception thrown by HtmlHelperBase" + exe);
		}
	}
}