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[WSO2-Release] [Release 5.0.3] update documentation for release 5.0.3
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| # API Docs - v5.0.3 | ||
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| ## Sinkmapper | ||
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| ### json *<a target="_blank" href="http://siddhi.io/documentation/siddhi-5.x/query-guide-5.x/#sink-mapper">(Sink Mapper)</a>* | ||
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| <p style="word-wrap: break-word">This extension is an Event to JSON output mapper. <br>Transports that publish messages can utilize this extension to convert Siddhi events to JSON messages. <br>You can either send a pre-defined JSON format or a custom JSON message.<br></p> | ||
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| <span id="syntax" class="md-typeset" style="display: block; font-weight: bold;">Syntax</span> | ||
| ``` | ||
| @sink(..., @map(type="json", validate.json="<BOOL>", enclosing.element="<STRING>") | ||
| ``` | ||
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| <span id="query-parameters" class="md-typeset" style="display: block; color: rgba(0, 0, 0, 0.54); font-size: 12.8px; font-weight: bold;">QUERY PARAMETERS</span> | ||
| <table> | ||
| <tr> | ||
| <th>Name</th> | ||
| <th style="min-width: 20em">Description</th> | ||
| <th>Default Value</th> | ||
| <th>Possible Data Types</th> | ||
| <th>Optional</th> | ||
| <th>Dynamic</th> | ||
| </tr> | ||
| <tr> | ||
| <td style="vertical-align: top">validate.json</td> | ||
| <td style="vertical-align: top; word-wrap: break-word">If this property is set to <code>true</code>, it enables JSON validation for the JSON messages generated. <br>When validation is carried out, messages that do not adhere to proper JSON standards are dropped. This property is set to 'false' by default. <br></td> | ||
| <td style="vertical-align: top">false</td> | ||
| <td style="vertical-align: top">BOOL</td> | ||
| <td style="vertical-align: top">Yes</td> | ||
| <td style="vertical-align: top">No</td> | ||
| </tr> | ||
| <tr> | ||
| <td style="vertical-align: top">enclosing.element</td> | ||
| <td style="vertical-align: top; word-wrap: break-word">This specifies the enclosing element to be used if multiple events are sent in the same JSON message. <br>Siddhi treats the child elements of the given enclosing element as events and executes JSON expressions on them. <br>If an <code>enclosing.element</code> is not provided, the multiple event scenario is disregarded and JSON path is evaluated based on the root element.</td> | ||
| <td style="vertical-align: top">$</td> | ||
| <td style="vertical-align: top">STRING</td> | ||
| <td style="vertical-align: top">Yes</td> | ||
| <td style="vertical-align: top">No</td> | ||
| </tr> | ||
| </table> | ||
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| <span id="examples" class="md-typeset" style="display: block; font-weight: bold;">Examples</span> | ||
| <span id="example-1" class="md-typeset" style="display: block; color: rgba(0, 0, 0, 0.54); font-size: 12.8px; font-weight: bold;">EXAMPLE 1</span> | ||
| ``` | ||
| @sink(type='inMemory', topic='stock', @map(type='json')) | ||
| define stream FooStream (symbol string, price float, volume long); | ||
| ``` | ||
| <p style="word-wrap: break-word">Above configuration does a default JSON input mapping that generates the output given below.<br>{<br> "event":{<br> "symbol":WSO2,<br> "price":55.6,<br> "volume":100<br> }<br>}<br></p> | ||
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| <span id="example-2" class="md-typeset" style="display: block; color: rgba(0, 0, 0, 0.54); font-size: 12.8px; font-weight: bold;">EXAMPLE 2</span> | ||
| ``` | ||
| @sink(type='inMemory', topic='{{symbol}}', @map(type='json', enclosing.element='$.portfolio', validate.json='true', @payload( """{"StockData":{"Symbol":"{{symbol}}","Price":{{price}}}"""))) | ||
| define stream BarStream (symbol string, price float, volume long); | ||
| ``` | ||
| <p style="word-wrap: break-word">The above configuration performs a custom JSON mapping that generates the following JSON message as the output.<br>{"portfolio":{<br> "StockData":{<br> "Symbol":WSO2,<br> "Price":55.6<br> }<br> }<br>}</p> | ||
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| ## Sourcemapper | ||
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| ### json *<a target="_blank" href="http://siddhi.io/documentation/siddhi-5.x/query-guide-5.x/#source-mapper">(Source Mapper)</a>* | ||
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| <p style="word-wrap: break-word">This extension is a JSON-to-Event input mapper. Transports that accept JSON messages can utilize this extension to convert an incoming JSON message into a Siddhi event. Users can either send a pre-defined JSON format, where event conversion happens without any configurations, or use the JSON path to map from a custom JSON message.<br>In default mapping, the JSON string of the event can be enclosed by the element "event", though optional.</p> | ||
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| <span id="syntax" class="md-typeset" style="display: block; font-weight: bold;">Syntax</span> | ||
| ``` | ||
| @source(..., @map(type="json", enclosing.element="<STRING>", fail.on.missing.attribute="<BOOL>") | ||
| ``` | ||
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| <span id="query-parameters" class="md-typeset" style="display: block; color: rgba(0, 0, 0, 0.54); font-size: 12.8px; font-weight: bold;">QUERY PARAMETERS</span> | ||
| <table> | ||
| <tr> | ||
| <th>Name</th> | ||
| <th style="min-width: 20em">Description</th> | ||
| <th>Default Value</th> | ||
| <th>Possible Data Types</th> | ||
| <th>Optional</th> | ||
| <th>Dynamic</th> | ||
| </tr> | ||
| <tr> | ||
| <td style="vertical-align: top">enclosing.element</td> | ||
| <td style="vertical-align: top; word-wrap: break-word">This is used to specify the enclosing element when sending multiple events in the same JSON message. <br>Mapper treats the child elements of a given enclosing element as events and executes the JSON path expressions on these child elements. <br>If the enclosing.element is not provided then the multiple-event scenario is disregarded and the JSON path is evaluated based on the root element.</td> | ||
| <td style="vertical-align: top">$</td> | ||
| <td style="vertical-align: top">STRING</td> | ||
| <td style="vertical-align: top">Yes</td> | ||
| <td style="vertical-align: top">No</td> | ||
| </tr> | ||
| <tr> | ||
| <td style="vertical-align: top">fail.on.missing.attribute</td> | ||
| <td style="vertical-align: top; word-wrap: break-word"><br>This parameter allows users to handle unknown attributes.The value of this can either be true or false. By default it is true. <br> If a JSON execution fails or returns null, mapper drops that message. <br>However, setting this property to false prompts mapper to send an event with a null value to Siddhi, where users can handle it as required, ie., assign a default value.)</td> | ||
| <td style="vertical-align: top">true</td> | ||
| <td style="vertical-align: top">BOOL</td> | ||
| <td style="vertical-align: top">Yes</td> | ||
| <td style="vertical-align: top">No</td> | ||
| </tr> | ||
| </table> | ||
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| <span id="examples" class="md-typeset" style="display: block; font-weight: bold;">Examples</span> | ||
| <span id="example-1" class="md-typeset" style="display: block; color: rgba(0, 0, 0, 0.54); font-size: 12.8px; font-weight: bold;">EXAMPLE 1</span> | ||
| ``` | ||
| @source(type='inMemory', topic='stock', @map(type='json')) | ||
| define stream FooStream (symbol string, price float, volume long); | ||
| ``` | ||
| <p style="word-wrap: break-word">This configuration performs a default JSON input mapping.<br> For a single event, the input is required to be in one of the following formats:<br>{<br> "event":{<br> "symbol":"WSO2",<br> "price":55.6,<br> "volume":100<br> }<br>}<br><br>or <br><br>{<br> "symbol":"WSO2",<br> "price":55.6,<br> "volume":100<br>}<br></p> | ||
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| <span id="example-2" class="md-typeset" style="display: block; color: rgba(0, 0, 0, 0.54); font-size: 12.8px; font-weight: bold;">EXAMPLE 2</span> | ||
| ``` | ||
| @source(type='inMemory', topic='stock', @map(type='json')) | ||
| define stream FooStream (symbol string, price float, volume long); | ||
| ``` | ||
| <p style="word-wrap: break-word">This configuration performs a default JSON input mapping. <br>For multiple events, the input is required to be in one of the following formats:<br>[<br>{"event":{"symbol":"WSO2","price":55.6,"volume":100}},<br>{"event":{"symbol":"WSO2","price":56.6,"volume":99}},<br>{"event":{"symbol":"WSO2","price":57.6,"volume":80}}<br>]<br><br>or <br><br>[<br>{"symbol":"WSO2","price":55.6,"volume":100},<br>{"symbol":"WSO2","price":56.6,"volume":99},<br>{"symbol":"WSO2","price":57.6,"volume":80}<br>]</p> | ||
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| <span id="example-3" class="md-typeset" style="display: block; color: rgba(0, 0, 0, 0.54); font-size: 12.8px; font-weight: bold;">EXAMPLE 3</span> | ||
| ``` | ||
| @source(type='inMemory', topic='stock', @map(type='json', enclosing.element="$.portfolio", @attributes(symbol = "company.symbol", price = "price", volume = "volume"))) | ||
| ``` | ||
| <p style="word-wrap: break-word">This configuration performs a custom JSON mapping.<br>For a single event, the expected input is similar to the one shown below:<br>.{<br> "portfolio":{<br> "stock":{ "volume":100,<br> "company":{<br> "symbol":"WSO2"<br> },<br> "price":55.6<br> }<br>}<br></p> | ||
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| <span id="example-4" class="md-typeset" style="display: block; color: rgba(0, 0, 0, 0.54); font-size: 12.8px; font-weight: bold;">EXAMPLE 4</span> | ||
| ``` | ||
| @source(type='inMemory', topic='stock', @map(type='json', enclosing.element="$.portfolio", @attributes(symbol = "stock.company.symbol", price = "stock.price", volume = "stock.volume"))) | ||
| define stream FooStream (symbol string, price float, volume long); | ||
| ``` | ||
| <p style="word-wrap: break-word">The configuration performs a custom JSON mapping.<br>For multiple events, expected input looks as follows.<br>.{"portfolio":<br> [ {"stock":{"volume":100,"company":{"symbol":"wso2"},"price":56.6}}, {"stock":{"volume":200,"company":{"symbol":"wso2"},"price":57.6}} ]<br>}<br></p> | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,4 +1,4 @@ | ||
| # API Docs - v5.0.2 | ||
| # API Docs - v5.0.3 | ||
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| ## Sinkmapper | ||
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