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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: */ 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: */ 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: */ 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: */ 163: public int value() 164: { 165: return _value; 166: }