1 | /**
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2 | * Copyright 2015 Google Inc. All Rights Reserved.
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3 | *
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4 | * Licensed under the Apache License, Version 2.0 (the "License");
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5 | * you may not use this file except in compliance with the License.
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6 | * You may obtain a copy of the License at
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7 | *
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8 | * http://www.apache.org/licenses/LICENSE-2.0
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9 | *
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10 | * Unless required by applicable law or agreed to in writing, software
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11 | * distributed under the License is distributed on an "AS IS" BASIS,
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 | * See the License for the specific language governing permissions and
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14 | * limitations under the License.
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15 | */
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16 |
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17 | ;
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18 |
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19 |
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20 | var cls = require('continuation-local-storage');
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21 |
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22 | /** @const {string} */
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23 | var TRACE_NAMESPACE = 'com.google.cloud.trace';
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24 |
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25 | function createNamespace() {
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26 | return cls.createNamespace(TRACE_NAMESPACE);
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27 | }
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28 |
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29 | function destroyNamespace() {
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30 | cls.destroyNamespace(TRACE_NAMESPACE);
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31 | }
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32 |
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33 | function getNamespace() {
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34 | return cls.getNamespace(TRACE_NAMESPACE);
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35 | }
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36 |
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37 | module.exports = {
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38 | createNamespace: createNamespace,
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39 |
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40 | destroyNamespace: destroyNamespace,
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41 |
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42 | getNamespace: getNamespace,
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43 |
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44 | getRootContext: function getRootContext() {
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45 | // First getNamespace check is necessary in case any
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46 | // patched closures escaped before the agent was stopped and the
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47 | // namespace was destroyed.
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48 | if (getNamespace() && getNamespace().get('root')) {
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49 | return getNamespace().get('root');
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50 | }
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51 | return null;
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52 | },
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53 |
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54 | setRootContext: function setRootContext(rootContext) {
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55 | getNamespace().set('root', rootContext);
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56 | }
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57 | };
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58 |
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