1 /**
   2  * AUTOHIT 2003
   3  * Copyright Erich P Gatejen (c) 1989,1997,2003,2004
   4  * 
   5  * This program is free software; you can redistribute it and/or modify 
   6  * it under the terms of the GNU General Public License as published by 
   7  * the Free Software Foundation; either version 2 of the License, or (at
   8  * your option) any later version.
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12  * more details.
  13  * 
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  17  *
  18  * Additional license information can be found in the documentation.
  19  * @author Erich P Gatejen
  20  */
  21 package autohit.server.command;
  22 
  23 import java.io.InputStream;
  24 import java.io.OutputStream;
  25 
  26 import autohit.common.AutohitErrorCodes;
  27 import autohit.common.AutohitProperties;
  28 import autohit.creator.compiler.XmlCompiler;
  29 import autohit.server.ServerException;
  30 import autohit.universe.UniverseException;
  31 import autohit.vm.VMExecutableWrapper;
  32 
  33 /**
  34  * The COMPILE command.  It expects a single string that points
  35  * to the universe object to compile
  36  * <p>
  37  * <code>
  38  * COMMAND LIST
  39  * this.assert(false,false,false,false,true,false)
  40  * 0-UNI 		- OPTIONAL
  41  * 1-RESPONSE 	- OPTIONAL
  42  * 2-TARGET		- UNUSED
  43  * 3-CLASS		- UNUSED
  44  * 4-COMMAND	- REQUIRED	- Name of object in universe to compile;
  45  * 5-OBJECT		- UNUSED
  46  * </code>
  47  * 
  48  * @author Erich P. Gatejen
  49  * @version 1.0
  50  * <i>Version History</i>
  51  * <code>EPG - Initial - 24Jul03
  52  * EPG - rewrite for new scheme - 31Jul03</code>
  53  * 
  54  */
  55 public class CommandCompile extends Command {
  56 
  57 	final static long serialVersionUID = 1;
  58 	
  59 	/**
  60 	 * My name
  61 	 */
  62 	public final static String MY_NAME = "compile";
  63 
  64 	/**
  65 	 * Execute the command.
  66 	 * @throws ServerException
  67 	 * @return return the manreadable message for success.
  68 	 */
  69 	public String execute() throws ServerException {
  70 
  71 		InputStream is;
  72 		OutputStream os;
  73 		XmlCompiler cp;
  74 		VMExecutableWrapper ob;
  75 		String dest;
  76 
  77 		try {
  78 
  79 			// find it
  80 			is = uni.getStream(command);
  81 
  82 			// compile it
  83 			cp = sc.getCompiler();
  84 			ob = (VMExecutableWrapper) cp.compile(is);
  85 
  86 			// Did compile succeed?
  87 			if (ob == null) {
  88 				// NO
  89 				throw new ServerException(
  90 					"Compile of " + command + " failed.",
  91 					AutohitErrorCodes.CODE_COMPILE_ABORT);
  92 
  93 			} else {
  94 				// are we replacing an object in the cache?  if so, kill it
  95 				// and dump it out of any loader cache
  96 				dest =
  97 					AutohitProperties.literal_UNIVERSE_CACHE
  98 						+ AutohitProperties.literal_NAME_SEPERATOR
  99 						+ command;
 100 				if (uni.exists(dest)) {
 101 					uni.remove(dest);
 102 					sc.getLoader().flush(command);
 103 				}
 104 				// save it to the cache
 105 				os = uni.putStream(dest);
 106 				ob.save(os);
 107 			}
 108 
 109 		} catch (ServerException sse) {
 110 			throw sse;
 111 		} catch (UniverseException ue) {
 112 			switch (ue.numeric) {
 113 				case UniverseException.UE_OBJECT_DOESNT_EXIST :
 114 					throw new ServerException(
 115 						"Could not find source in the specified universe.  Source="
 116 							+ command,
 117 						ue.numeric);
 118 				case UniverseException.UE_OBJECT_LOCKED :
 119 				case UniverseException.UE_DONT_OWN_THE_LOCK :
 120 				case UniverseException.UE_CANNOT_STREAM :
 121 					throw new ServerException(
 122 						"Could not find source in the specified universe.   Universe won't let us stream to the object.",
 123 						ue.numeric);
 124 				default :
 125 					throw new ServerException(
 126 						"Failed to serious Universe exception.  message="
 127 							+ ue.getMessage(),
 128 						ue.numeric);
 129 			}
 130 		} catch (Exception eee) {
 131 			throw new ServerException(
 132 				"Failed to general exception.  message=" + eee.getMessage(),
 133 				AutohitErrorCodes.CODE_COMMAND_FAULT);
 134 		}
 135 
 136 		// return 
 137 		return "Compile of " + command + " completed with no errors";
 138 	}
 139 
 140 	/**
 141 	 * Verify the Compile command. 
 142 	 * @throws ServerException
 143 	 * @return return the manreadable message for accepting the command.
 144 	 */
 145 	public String verify() throws ServerException {
 146 		this.assertparam(false,false,false,false,true,false);
 147 		return "parameters are good.";
 148 	}
 149 
 150 	/**
 151 	 * Get the textual name for the command.
 152 	 * @return return the manreadable name of this command.
 153 	 */
 154 	public String getName(){
 155 		return MY_NAME;
 156 	}
 157 }