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annotate src/org/eclipse/jetty/server/AsyncContinuation.java @ 938:a088981f9cd4

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remove more async code
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 09 Oct 2016 23:48:32 -0600
parents 0541b6034003
children
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rev   line source
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1 //
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2 // ========================================================================
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
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4 // ------------------------------------------------------------------------
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5 // All rights reserved. This program and the accompanying materials
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6 // are made available under the terms of the Eclipse Public License v1.0
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7 // and Apache License v2.0 which accompanies this distribution.
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8 //
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9 // The Eclipse Public License is available at
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10 // http://www.eclipse.org/legal/epl-v10.html
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11 //
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12 // The Apache License v2.0 is available at
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13 // http://www.opensource.org/licenses/apache2.0.php
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14 //
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15 // You may elect to redistribute this code under either of these licenses.
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16 // ========================================================================
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17 //
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18
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19 package org.eclipse.jetty.server;
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20
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21 import org.slf4j.Logger;
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22 import org.slf4j.LoggerFactory;
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23
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24
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25 public final class AsyncContinuation
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26 {
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27 private static final Logger LOG = LoggerFactory.getLogger(AsyncContinuation.class);
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28
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29 // STATES:
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30 // handling() suspend() unhandle() resume() complete() doComplete()
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31 // startAsync() dispatch()
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32 // IDLE DISPATCHED
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33 // DISPATCHED ASYNCSTARTED UNCOMPLETED
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34 // ASYNCSTARTED ASYNCWAIT REDISPATCHING COMPLETING
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35 // REDISPATCHING REDISPATCHED
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36 // ASYNCWAIT REDISPATCH COMPLETING
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37 // REDISPATCH REDISPATCHED
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38 // REDISPATCHED ASYNCSTARTED UNCOMPLETED
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39 // COMPLETING UNCOMPLETED UNCOMPLETED
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40 // UNCOMPLETED COMPLETED
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41 // COMPLETED
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42 private static final int __IDLE=0; // Idle request
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43 private static final int __DISPATCHED=1; // Request dispatched to filter/servlet
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44 private static final int __UNCOMPLETED=8; // Request is completable
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45 private static final int __COMPLETED=9; // Request is complete
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46
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47 private int _state;
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48
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49 AsyncContinuation()
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50 {
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51 _state=__IDLE;
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52 }
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53
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54 @Override
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55 public synchronized String toString()
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56 {
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57 return super.toString()+"@"+getStatusString();
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58 }
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59
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60 private synchronized String getStatusString()
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61 {
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62 return
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63 ((_state==__IDLE)?"IDLE":
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64 (_state==__DISPATCHED)?"DISPATCHED":
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65 (_state==__UNCOMPLETED)?"UNCOMPLETED":
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66 (_state==__COMPLETED)?"COMPLETE":
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67 ("UNKNOWN?"+_state));
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68 }
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69
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70 protected synchronized void handling()
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71 {
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72 switch(_state)
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73 {
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74 case __IDLE:
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75 _state=__DISPATCHED;
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76 return;
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77
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78 default:
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79 throw new IllegalStateException(this.getStatusString());
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80 }
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81 }
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82
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83 /* ------------------------------------------------------------ */
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84 /**
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85 * Signal that the HttpConnection has finished handling the request.
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86 * For blocking connectors, this call may block if the request has
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87 * been suspended (startAsync called).
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88 * @return true if handling is complete, false if the request should
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89 * be handled again (eg because of a resume that happened before unhandle was called)
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90 */
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91 protected synchronized void unhandle()
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92 {
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93 switch(_state)
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94 {
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95 case __DISPATCHED:
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96 _state = __UNCOMPLETED;
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97 return;
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98
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99 default:
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100 throw new IllegalStateException(this.getStatusString());
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101 }
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102 }
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103
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104
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105 protected synchronized void doComplete(Throwable ex)
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106 {
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107 switch(_state)
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108 {
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109 case __UNCOMPLETED:
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110 _state = __COMPLETED;
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111 break;
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112
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113 default:
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114 throw new IllegalStateException(this.getStatusString());
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115 }
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116 }
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117
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118 protected synchronized void recycle()
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119 {
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120 switch(_state)
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121 {
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122 case __DISPATCHED:
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123 throw new IllegalStateException(getStatusString());
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124 default:
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125 _state=__IDLE;
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126 }
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127 }
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128
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129 synchronized boolean isUncompleted()
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130 {
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131 return _state==__UNCOMPLETED;
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132 }
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133 }