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  66   <h1>Source code for nepi.resources.ns3.ns3dceapplication</h1><div class="highlight"><pre>
  67 <span class="c">#</span>
  68 <span class="c">#    NEPI, a framework to manage network experiments</span>
  69 <span class="c">#    Copyright (C) 2014 INRIA</span>
  70 <span class="c">#</span>
  71 <span class="c">#    This program is free software: you can redistribute it and/or modify</span>
  72 <span class="c">#    it under the terms of the GNU General Public License version 2 as</span>
  73 <span class="c">#    published by the Free Software Foundation;</span>
  74 <span class="c">#</span>
  75 <span class="c">#    This program is distributed in the hope that it will be useful,</span>
  76 <span class="c">#    but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
  77 <span class="c">#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span>
  78 <span class="c">#    GNU General Public License for more details.</span>
  79 <span class="c">#</span>
  80 <span class="c">#    You should have received a copy of the GNU General Public License</span>
  81 <span class="c">#    along with this program.  If not, see &lt;http://www.gnu.org/licenses/&gt;.</span>
  82 <span class="c">#</span>
  83 <span class="c"># Author: Alina Quereilhac &lt;alina.quereilhac@inria.fr&gt;</span>
  84
  85 <span class="kn">from</span> <span class="nn">nepi.execution.attribute</span> <span class="kn">import</span> <span class="n">Attribute</span><span class="p">,</span> <span class="n">Flags</span><span class="p">,</span> <span class="n">Types</span>
  86 <span class="kn">from</span> <span class="nn">nepi.execution.resource</span> <span class="kn">import</span> <span class="n">clsinit_copy</span><span class="p">,</span> <span class="n">ResourceState</span>
  87 <span class="kn">from</span> <span class="nn">nepi.resources.ns3.ns3application</span> <span class="kn">import</span> <span class="n">NS3BaseApplication</span>
  88 <span class="kn">from</span> <span class="nn">nepi.execution.trace</span> <span class="kn">import</span> <span class="n">TraceAttr</span>
  89
  90 <span class="kn">from</span> <span class="nn">nepi.resources.ns3.ns3wrapper</span> <span class="kn">import</span> <span class="n">SIMULATOR_UUID</span>
  91
  92 <span class="kn">import</span> <span class="nn">os</span>
  93 <span class="kn">import</span> <span class="nn">time</span>
  94 <span class="kn">import</span> <span class="nn">threading</span>
  95
  96 <span class="nd">@clsinit_copy</span>
  97 <div class="viewcode-block" id="NS3BaseDceApplication"><a class="viewcode-back" href="../../../../_layout/nepi.resources.ns3.html#nepi.resources.ns3.ns3dceapplication.NS3BaseDceApplication">[docs]</a><span class="k">class</span> <span class="nc">NS3BaseDceApplication</span><span class="p">(</span><span class="n">NS3BaseApplication</span><span class="p">):</span>
  98     <span class="n">_rtype</span> <span class="o">=</span> <span class="s">&quot;abstract::ns3::DceApplication&quot;</span>
  99
 100     <span class="nd">@classmethod</span>
 101     <span class="k">def</span> <span class="nf">_register_attributes</span><span class="p">(</span><span class="n">cls</span><span class="p">):</span>
 102         <span class="n">binary</span> <span class="o">=</span> <span class="n">Attribute</span><span class="p">(</span><span class="s">&quot;binary&quot;</span><span class="p">,</span>
 103                 <span class="s">&quot;Name of binary to execute&quot;</span><span class="p">,</span>
 104                 <span class="n">flags</span> <span class="o">=</span> <span class="n">Flags</span><span class="o">.</span><span class="n">Design</span><span class="p">)</span>
 105
 106         <span class="n">stack_size</span> <span class="o">=</span> <span class="n">Attribute</span><span class="p">(</span><span class="s">&quot;stackSize&quot;</span><span class="p">,</span>
 107                 <span class="s">&quot;Stack Size for DCE&quot;</span><span class="p">,</span>
 108                 <span class="nb">type</span> <span class="o">=</span> <span class="n">Types</span><span class="o">.</span><span class="n">Integer</span><span class="p">,</span>
 109                 <span class="n">default</span> <span class="o">=</span> <span class="mi">1</span><span class="o">&lt;&lt;</span><span class="mi">20</span><span class="p">,</span>
 110                 <span class="n">flags</span> <span class="o">=</span> <span class="n">Flags</span><span class="o">.</span><span class="n">Design</span><span class="p">)</span>
 111
 112         <span class="n">arguments</span> <span class="o">=</span> <span class="n">Attribute</span><span class="p">(</span><span class="s">&quot;arguments&quot;</span><span class="p">,</span>
 113                 <span class="s">&quot;Semi-colon separated list of arguments for the application&quot;</span><span class="p">,</span>
 114                 <span class="n">flags</span> <span class="o">=</span> <span class="n">Flags</span><span class="o">.</span><span class="n">Design</span><span class="p">)</span>
 115
 116         <span class="n">environment</span> <span class="o">=</span> <span class="n">Attribute</span><span class="p">(</span><span class="s">&quot;environment&quot;</span><span class="p">,</span>
 117                 <span class="s">&quot;Semi-colon separated list of &#39;key=value&#39; pairs to set as &quot;</span>
 118                 <span class="s">&quot;DCE environment variables.&quot;</span><span class="p">,</span>
 119                 <span class="n">flags</span> <span class="o">=</span> <span class="n">Flags</span><span class="o">.</span><span class="n">Design</span><span class="p">)</span>
 120
 121         <span class="n">use_dlm</span> <span class="o">=</span> <span class="n">Attribute</span><span class="p">(</span><span class="s">&quot;useDlmLoader&quot;</span><span class="p">,</span>
 122                 <span class="s">&quot;Use ns3::DlmLoaderFactory as library loader&quot;</span><span class="p">,</span>
 123                 <span class="nb">type</span> <span class="o">=</span> <span class="n">Types</span><span class="o">.</span><span class="n">Bool</span><span class="p">,</span>
 124                 <span class="n">flags</span> <span class="o">=</span> <span class="n">Flags</span><span class="o">.</span><span class="n">Design</span><span class="p">)</span>
 125
 126         <span class="n">starttime</span> <span class="o">=</span> <span class="n">Attribute</span><span class="p">(</span><span class="s">&quot;StartTime&quot;</span><span class="p">,</span>
 127             <span class="s">&quot;Time at which the application will start&quot;</span><span class="p">,</span>
 128             <span class="n">default</span> <span class="o">=</span> <span class="s">&quot;+0.0ns&quot;</span><span class="p">,</span>
 129             <span class="n">flags</span> <span class="o">=</span> <span class="n">Flags</span><span class="o">.</span><span class="n">Reserved</span> <span class="o">|</span> <span class="n">Flags</span><span class="o">.</span><span class="n">Construct</span><span class="p">)</span>
 130
 131         <span class="n">stoptime</span> <span class="o">=</span> <span class="n">Attribute</span><span class="p">(</span><span class="s">&quot;StopTime&quot;</span><span class="p">,</span>
 132             <span class="s">&quot;Time at which the application will stop&quot;</span><span class="p">,</span>
 133             <span class="n">default</span> <span class="o">=</span> <span class="s">&quot;+0.0ns&quot;</span><span class="p">,</span>
 134             <span class="n">flags</span> <span class="o">=</span> <span class="n">Flags</span><span class="o">.</span><span class="n">Reserved</span> <span class="o">|</span> <span class="n">Flags</span><span class="o">.</span><span class="n">Construct</span><span class="p">)</span>
 135
 136         <span class="n">cls</span><span class="o">.</span><span class="n">_register_attribute</span><span class="p">(</span><span class="n">binary</span><span class="p">)</span>
 137         <span class="n">cls</span><span class="o">.</span><span class="n">_register_attribute</span><span class="p">(</span><span class="n">stack_size</span><span class="p">)</span>
 138         <span class="n">cls</span><span class="o">.</span><span class="n">_register_attribute</span><span class="p">(</span><span class="n">arguments</span><span class="p">)</span>
 139         <span class="n">cls</span><span class="o">.</span><span class="n">_register_attribute</span><span class="p">(</span><span class="n">environment</span><span class="p">)</span>
 140         <span class="n">cls</span><span class="o">.</span><span class="n">_register_attribute</span><span class="p">(</span><span class="n">use_dlm</span><span class="p">)</span>
 141         <span class="n">cls</span><span class="o">.</span><span class="n">_register_attribute</span><span class="p">(</span><span class="n">stoptime</span><span class="p">)</span>
 142         <span class="n">cls</span><span class="o">.</span><span class="n">_register_attribute</span><span class="p">(</span><span class="n">starttime</span><span class="p">)</span>
 143
 144     <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">ec</span><span class="p">,</span> <span class="n">guid</span><span class="p">):</span>
 145         <span class="nb">super</span><span class="p">(</span><span class="n">NS3BaseDceApplication</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="n">ec</span><span class="p">,</span> <span class="n">guid</span><span class="p">)</span>
 146         <span class="bp">self</span><span class="o">.</span><span class="n">_pid</span> <span class="o">=</span> <span class="bp">None</span>
 147
 148     <span class="nd">@property</span>
 149 <div class="viewcode-block" id="NS3BaseDceApplication.pid"><a class="viewcode-back" href="../../../../_layout/nepi.resources.ns3.html#nepi.resources.ns3.ns3dceapplication.NS3BaseDceApplication.pid">[docs]</a>    <span class="k">def</span> <span class="nf">pid</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 150         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_pid</span>
 151 </div>
 152     <span class="k">def</span> <span class="nf">_instantiate_object</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 153         <span class="k">pass</span>
 154
 155     <span class="k">def</span> <span class="nf">_connect_object</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 156         <span class="n">node</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">node</span>
 157         <span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">uuid</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">connected</span><span class="p">:</span>
 158             <span class="bp">self</span><span class="o">.</span><span class="n">_connected</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">uuid</span><span class="p">)</span>
 159
 160             <span class="c"># Preventing concurrent access to the DceApplicationHelper</span>
 161             <span class="c"># from different DceApplication RMs</span>
 162             <span class="n">dce_helper</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">dce_helper</span>
 163
 164             <span class="k">with</span> <span class="n">dce_helper</span><span class="o">.</span><span class="n">dce_application_lock</span><span class="p">:</span>
 165                 <span class="n">dce_app_uuid</span> <span class="o">=</span> <span class="n">dce_helper</span><span class="o">.</span><span class="n">dce_application_uuid</span>
 166
 167                 <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">invoke</span><span class="p">(</span><span class="n">dce_app_uuid</span><span class="p">,</span> <span class="s">&quot;ResetArguments&quot;</span><span class="p">)</span>
 168
 169                 <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">invoke</span><span class="p">(</span><span class="n">dce_app_uuid</span><span class="p">,</span> <span class="s">&quot;ResetEnvironment&quot;</span><span class="p">)</span>
 170
 171                 <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">invoke</span><span class="p">(</span><span class="n">dce_app_uuid</span><span class="p">,</span>
 172                         <span class="s">&quot;SetBinary&quot;</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;binary&quot;</span><span class="p">))</span>
 173
 174                 <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">invoke</span><span class="p">(</span><span class="n">dce_app_uuid</span><span class="p">,</span>
 175                         <span class="s">&quot;SetStackSize&quot;</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;stackSize&quot;</span><span class="p">))</span>
 176
 177                 <span class="n">arguments</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;arguments&quot;</span><span class="p">)</span>
 178                 <span class="k">if</span> <span class="n">arguments</span><span class="p">:</span>
 179                     <span class="k">for</span> <span class="n">arg</span> <span class="ow">in</span> <span class="nb">map</span><span class="p">(</span><span class="nb">str</span><span class="o">.</span><span class="n">strip</span><span class="p">,</span> <span class="n">arguments</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s">&quot;;&quot;</span><span class="p">)):</span>
 180                         <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">invoke</span><span class="p">(</span><span class="n">dce_app_uuid</span><span class="p">,</span>
 181                             <span class="s">&quot;AddArgument&quot;</span><span class="p">,</span> <span class="n">arg</span><span class="p">)</span>
 182
 183                 <span class="n">environment</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;environment&quot;</span><span class="p">)</span>
 184                 <span class="k">if</span> <span class="n">environment</span><span class="p">:</span>
 185                     <span class="k">for</span> <span class="n">env</span> <span class="ow">in</span> <span class="nb">map</span><span class="p">(</span><span class="nb">str</span><span class="o">.</span><span class="n">strip</span><span class="p">,</span> <span class="n">environment</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s">&quot;;&quot;</span><span class="p">)):</span>
 186                         <span class="n">key</span><span class="p">,</span> <span class="n">val</span> <span class="o">=</span> <span class="n">env</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s">&quot;=&quot;</span><span class="p">)</span>
 187                         <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">invoke</span><span class="p">(</span><span class="n">dce_app_uuid</span><span class="p">,</span>
 188                             <span class="s">&quot;AddEnvironment&quot;</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">val</span><span class="p">)</span>
 189
 190                 <span class="n">apps_uuid</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">invoke</span><span class="p">(</span><span class="n">dce_app_uuid</span><span class="p">,</span>
 191                         <span class="s">&quot;InstallInNode&quot;</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">node</span><span class="o">.</span><span class="n">uuid</span><span class="p">)</span>
 192
 193             <span class="bp">self</span><span class="o">.</span><span class="n">_uuid</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">invoke</span><span class="p">(</span><span class="n">apps_uuid</span><span class="p">,</span> <span class="s">&quot;Get&quot;</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
 194
 195             <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">has_changed</span><span class="p">(</span><span class="s">&quot;StartTime&quot;</span><span class="p">):</span>
 196                 <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">ns3_set</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">uuid</span><span class="p">,</span> <span class="s">&quot;StartTime&quot;</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;StartTime&quot;</span><span class="p">))</span>
 197
 198             <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">has_changed</span><span class="p">(</span><span class="s">&quot;StopTime&quot;</span><span class="p">):</span>
 199                 <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">ns3_set</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">uuid</span><span class="p">,</span> <span class="s">&quot;StopTime&quot;</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;StopTime&quot;</span><span class="p">))</span>
 200
 201 <div class="viewcode-block" id="NS3BaseDceApplication.do_stop"><a class="viewcode-back" href="../../../../_layout/nepi.resources.ns3.html#nepi.resources.ns3.ns3dceapplication.NS3BaseDceApplication.do_stop">[docs]</a>    <span class="k">def</span> <span class="nf">do_stop</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 202         <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">state</span> <span class="o">==</span> <span class="n">ResourceState</span><span class="o">.</span><span class="n">STARTED</span><span class="p">:</span>
 203             <span class="c"># No need to do anything, simulation.Destroy() will stop every object</span>
 204             <span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s">&quot;Stopping command &#39;</span><span class="si">%s</span><span class="s">&#39;&quot;</span> <span class="o">%</span> <span class="n">command</span><span class="p">)</span>
 205             <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">invoke</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">uuid</span><span class="p">,</span> <span class="s">&quot;Stop&quot;</span><span class="p">)</span>
 206             <span class="bp">self</span><span class="o">.</span><span class="n">set_stopped</span><span class="p">()</span>
 207 </div>
 208 <div class="viewcode-block" id="NS3BaseDceApplication.do_start"><a class="viewcode-back" href="../../../../_layout/nepi.resources.ns3.html#nepi.resources.ns3.ns3dceapplication.NS3BaseDceApplication.do_start">[docs]</a>    <span class="k">def</span> <span class="nf">do_start</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 209         <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">state</span> <span class="o">&lt;</span> <span class="n">ResourceState</span><span class="o">.</span><span class="n">STARTED</span><span class="p">:</span>
 210             <span class="bp">self</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s">&quot;---- RESCHEDULING START ----&quot;</span> <span class="p">)</span>
 211             <span class="bp">self</span><span class="o">.</span><span class="n">ec</span><span class="o">.</span><span class="n">schedule</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">reschedule_delay</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">start</span><span class="p">)</span>
 212         <span class="k">else</span><span class="p">:</span>
 213             <span class="n">is_app_started</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">invoke</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">uuid</span><span class="p">,</span> <span class="s">&quot;isAppStarted&quot;</span><span class="p">)</span>
 214
 215             <span class="k">if</span> <span class="n">is_app_started</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">state</span> <span class="o">&gt;</span> <span class="n">ResourceState</span><span class="o">.</span><span class="n">STARTED</span><span class="p">:</span>
 216                 <span class="nb">super</span><span class="p">(</span><span class="n">NS3BaseApplication</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">do_start</span><span class="p">()</span>
 217                 <span class="bp">self</span><span class="o">.</span><span class="n">_start_time</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">start_time</span>
 218             <span class="k">else</span><span class="p">:</span>
 219                 <span class="c"># Reschedule until dce application is actually started</span>
 220                 <span class="bp">self</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s">&quot;---- RESCHEDULING START ----&quot;</span> <span class="p">)</span>
 221                 <span class="bp">self</span><span class="o">.</span><span class="n">ec</span><span class="o">.</span><span class="n">schedule</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">reschedule_delay</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">start</span><span class="p">)</span>
 222 </div>
 223 <div class="viewcode-block" id="NS3BaseDceApplication.trace"><a class="viewcode-back" href="../../../../_layout/nepi.resources.ns3.html#nepi.resources.ns3.ns3dceapplication.NS3BaseDceApplication.trace">[docs]</a>    <span class="k">def</span> <span class="nf">trace</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">attr</span> <span class="o">=</span> <span class="n">TraceAttr</span><span class="o">.</span><span class="n">ALL</span><span class="p">,</span> <span class="n">block</span> <span class="o">=</span> <span class="mi">512</span><span class="p">,</span> <span class="n">offset</span> <span class="o">=</span> <span class="mi">0</span><span class="p">):</span>
 224         <span class="bp">self</span><span class="o">.</span><span class="n">_configure_traces</span><span class="p">()</span>
 225         <span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">NS3BaseDceApplication</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">trace</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">attr</span> <span class="o">=</span> <span class="n">attr</span><span class="p">,</span>
 226                 <span class="n">block</span> <span class="o">=</span> <span class="n">block</span><span class="p">,</span> <span class="n">offset</span> <span class="o">=</span> <span class="n">offset</span><span class="p">)</span>
 227 </div>
 228     <span class="k">def</span> <span class="nf">_configure_traces</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
 229         <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">pid</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span><span class="p">:</span>
 230             <span class="k">return</span>
 231
 232         <span class="c"># Using lock to prevent concurrent access to the DceApplicationHelper</span>
 233         <span class="c"># from different DceApplication RMs</span>
 234         <span class="n">dce_helper</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">dce_helper</span>
 235
 236         <span class="k">with</span> <span class="n">dce_helper</span><span class="o">.</span><span class="n">dce_application_lock</span><span class="p">:</span>
 237             <span class="n">dce_app_uuid</span> <span class="o">=</span> <span class="n">dce_helper</span><span class="o">.</span><span class="n">dce_application_uuid</span>
 238
 239             <span class="bp">self</span><span class="o">.</span><span class="n">_pid</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">simulation</span><span class="o">.</span><span class="n">invoke</span><span class="p">(</span><span class="n">dce_app_uuid</span><span class="p">,</span>
 240                     <span class="s">&quot;GetPid&quot;</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">uuid</span><span class="p">)</span>
 241
 242         <span class="n">node_id</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">node</span><span class="o">.</span><span class="n">node_id</span>
 243         <span class="bp">self</span><span class="o">.</span><span class="n">_trace_filename</span><span class="p">[</span><span class="s">&quot;stdout&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s">&quot;files-</span><span class="si">%s</span><span class="s">/var/log/</span><span class="si">%s</span><span class="s">/stdout&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">node_id</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">pid</span><span class="p">)</span>
 244         <span class="bp">self</span><span class="o">.</span><span class="n">_trace_filename</span><span class="p">[</span><span class="s">&quot;stderr&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s">&quot;files-</span><span class="si">%s</span><span class="s">/var/log/</span><span class="si">%s</span><span class="s">/stderr&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">node_id</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">pid</span><span class="p">)</span>
 245         <span class="bp">self</span><span class="o">.</span><span class="n">_trace_filename</span><span class="p">[</span><span class="s">&quot;status&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s">&quot;files-</span><span class="si">%s</span><span class="s">/var/log/</span><span class="si">%s</span><span class="s">/status&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">node_id</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">pid</span><span class="p">)</span>
 246         <span class="bp">self</span><span class="o">.</span><span class="n">_trace_filename</span><span class="p">[</span><span class="s">&quot;cmdline&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s">&quot;files-</span><span class="si">%s</span><span class="s">/var/log/</span><span class="si">%s</span><span class="s">/cmdline&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">node_id</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">pid</span><span class="p">)</span>
 247 </pre></div></div>
 248
 249           </div>
 250         </div>
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 253     </div>
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