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1: /* ThreadPolicyValue.java -- 2: Copyright (C) 2005, 2006 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.BAD_PARAM; 45: import org.omg.CORBA.portable.IDLEntity; 46: 47: import java.io.Serializable; 48: 49: /** 50: * Defines the possible values for the POA thread policy. 51: * 52: * This enumeration can obtain the following values: 53: * <ul> 54: * <li>ORB_CTRL_MODEL Each object in POA has a separate serving thread 55: * and a separate server socket, listening on the objects individual 56: * port. Additionally, when the request is accepted, it is also 57: * served in a separate thread, so several requests to the same 58: * object can be processed in parallel. The servant can always get 59: * the Id and POA of the object it is currently serving by 60: * invoking {@link Servant#_object_id()} and {@link Servant#_poa}. 61: * These two methods use thread to data map and must work correctly 62: * even then the servant code is executed in several parallel threads. 63: * </li> 64: * <li>SINGLE_THREAD_MODEL All objects in POA share the same server 65: * socket and are served in the same thread. This model is applicable 66: * when the number of objects is greater than the number of threads 67: * and (or) ports, supported by the system.</li> 68: * </ul> 69: * OMG also defines a MAIN_THREAD_MODEL, currently not supported by 70: * the java API. 71: * 72: * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) 73: */ 74: public class ThreadPolicyValue 75: implements Serializable, IDLEntity 76: { 77: /** 78: * Use serialVersionUID (v1.4) for interoperability. 79: */ 80: private static final long serialVersionUID = -8874988828297141512L; 81: 82: /** 83: * The value field for the current instance. 84: */ 85: private final int _value; 86: 87: /** 88: * The possible value of this enumeration (ORB_CTRL_MODEL). 89: */ 90: public static final int _ORB_CTRL_MODEL = 0; 91: 92: /** 93: * An instance of ThreadPolicyValue, initialized to ORB_CTRL_MODEL. 94: */ 95: public static final ThreadPolicyValue ORB_CTRL_MODEL = 96: new ThreadPolicyValue(_ORB_CTRL_MODEL); 97: 98: /** 99: * The possible value of this enumeration (SINGLE_THREAD_MODEL). 100: */ 101: public static final int _SINGLE_THREAD_MODEL = 1; 102: 103: /** 104: * An instance of ThreadPolicyValue, initialized to SINGLE_THREAD_MODEL. 105: */ 106: public static final ThreadPolicyValue SINGLE_THREAD_MODEL = 107: new ThreadPolicyValue(_SINGLE_THREAD_MODEL); 108: 109: /** 110: * The private array that maps integer codes to the enumeration 111: * values. 112: */ 113: private static final ThreadPolicyValue[] enume = 114: new ThreadPolicyValue[] { ORB_CTRL_MODEL, SINGLE_THREAD_MODEL }; 115: 116: /** 117: * The private array of state names. 118: */ 119: private static final String[] state_names = 120: new String[] { "ORB_CTRL_MODEL", "SINGLE_THREAD_MODEL" }; 121: 122: /** 123: * Normally, no new instances are required, so the constructor is protected. 124: */ 125: protected ThreadPolicyValue(int a_value) 126: { 127: _value = a_value; 128: } 129: 130: /** 131: * Returns the ThreadPolicyValue, matching the given integer constant. 132: * 133: * @param code one of _ORB_CTRL_MODEL, _SINGLE_THREAD_MODEL. 134: * @return one of ORB_CTRL_MODEL, SINGLE_THREAD_MODEL. 135: * @throws BAD_PARAM if the parameter is not one of the valid values. 136: */ 137: public static ThreadPolicyValue from_int(int code) 138: { 139: try 140: { 141: return enume [ code ]; 142: } 143: catch (ArrayIndexOutOfBoundsException ex) 144: { 145: BAD_OPERATION bad = new BAD_OPERATION("Invalid policy code " + code); 146: bad.minor = Minor.PolicyType; 147: throw bad; 148: } 149: } 150: 151: /** 152: * Returns a short string representation. 153: * @return the name of the current enumeration value. 154: */ 155: public String toString() 156: { 157: return state_names [ _value ]; 158: } 159: 160: /** 161: * Returns the integer code of the enumeration value. 162: * @return one of ORB_CTRL_MODEL, SINGLE_THREAD_MODEL. 163: */ 164: public int value() 165: { 166: return _value; 167: } 168: }