1 /* ThreadPolicyValue.java -- 2 Copyright (C) 2005 Free Software Foundation, Inc. 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 02110-1301 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 39 package org.omg.PortableServer; 40 41 import gnu.CORBA.Minor; 42 43 import org.omg.CORBA.BAD_OPERATION; 44 import org.omg.CORBA.portable.IDLEntity; 45 46 import java.io.Serializable; 47 48 /** 49 * Defines the possible values for the POA thread policy. 50 * 51 * This enumeration can obtain the following values: 52 * <ul> 53 * <li>ORB_CTRL_MODEL Each object in POA has a separate serving thread 54 * and a separate server socket, listening on the objects individual 55 * port. Additionally, when the request is accepted, it is also 56 * served in a separate thread, so several requests to the same 57 * object can be processed in parallel. The servant can always get 58 * the Id and POA of the object it is currently serving by 59 * invoking {@link Servant#_object_id()} and {@link Servant#_poa}. 60 * These two methods use thread to data map and must work correctly 61 * even then the servant code is executed in several parallel threads. 62 * </li> 63 * <li>SINGLE_THREAD_MODEL All objects in POA share the same server 64 * socket and are served in the same thread. This model is applicable 65 * when the number of objects is greater than the number of threads 66 * and (or) ports, supported by the system.</li> 67 * </ul> 68 * OMG also defines a MAIN_THREAD_MODEL, currently not supported by 69 * the java API. 70 * 71 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) 72 */ 73 public class ThreadPolicyValue 74 implements Serializable, IDLEntity 75 { 76 /** 77 * Use serialVersionUID (v1.4) for interoperability. 78 */ 79 private static final long serialVersionUID = -8874988828297141512L; 80 81 /** 82 * The value field for the current instance. 83 */ 84 private final int _value; 85 86 /** 87 * The possible value of this enumeration (ORB_CTRL_MODEL). 88 */ 89 public static final int _ORB_CTRL_MODEL = 0; 90 91 /** 92 * An instance of ThreadPolicyValue, initialized to ORB_CTRL_MODEL. 93 */ 94 public static final ThreadPolicyValue ORB_CTRL_MODEL = 95 new ThreadPolicyValue(_ORB_CTRL_MODEL); 96 97 /** 98 * The possible value of this enumeration (SINGLE_THREAD_MODEL). 99 */ 100 public static final int _SINGLE_THREAD_MODEL = 1; 101 102 /** 103 * An instance of ThreadPolicyValue, initialized to SINGLE_THREAD_MODEL. 104 */ 105 public static final ThreadPolicyValue SINGLE_THREAD_MODEL = 106 new ThreadPolicyValue(_SINGLE_THREAD_MODEL); 107 108 /** 109 * The private array that maps integer codes to the enumeration 110 * values. 111 */ 112 private static final ThreadPolicyValue[] enume = 113 new ThreadPolicyValue[] { ORB_CTRL_MODEL, SINGLE_THREAD_MODEL }; 114 115 /** 116 * The private array of state names. 117 */ 118 private static final String[] state_names = 119 new String[] { "ORB_CTRL_MODEL", "SINGLE_THREAD_MODEL" }; 120 121 /** 122 * Normally, no new instances are required, so the constructor is protected. 123 */ ThreadPolicyValue(int a_value)124 protected ThreadPolicyValue(int a_value) 125 { 126 _value = a_value; 127 } 128 129 /** 130 * Returns the ThreadPolicyValue, matching the given integer constant. 131 * 132 * @param code one of _ORB_CTRL_MODEL, _SINGLE_THREAD_MODEL. 133 * @return one of ORB_CTRL_MODEL, SINGLE_THREAD_MODEL. 134 * @throws BAD_PARAM if the parameter is not one of the valid values. 135 */ from_int(int code)136 public static ThreadPolicyValue from_int(int code) 137 { 138 try 139 { 140 return enume [ code ]; 141 } 142 catch (ArrayIndexOutOfBoundsException ex) 143 { 144 BAD_OPERATION bad = new BAD_OPERATION("Invalid policy code " + code); 145 bad.minor = Minor.PolicyType; 146 throw bad; 147 } 148 } 149 150 /** 151 * Returns a short string representation. 152 * @return the name of the current enumeration value. 153 */ toString()154 public String toString() 155 { 156 return state_names [ _value ]; 157 } 158 159 /** 160 * Returns the integer code of the enumeration value. 161 * @return one of ORB_CTRL_MODEL, SINGLE_THREAD_MODEL. 162 */ value()163 public int value() 164 { 165 return _value; 166 } 167 }