mvel

How to iterate over a map in mvel

由 ╄→гoц情女王★ 提交于 2019-12-12 05:14:46
问题 I have a collection (map) which I want to use with the foreach orb tag. How do i do this in mvel and is it also possible to get the current key? 回答1: Map<Integer, Integer> map = new HashMap<Integer, Integer>(); //java for (Map.Entry<Integer, Integer> entry : map.entrySet()) { System.out.println("Key = " + entry.getKey() + ", Value = " + entry.getValue()); } //mvel foreach (c : map.entrySet) { System.out.println("Key = " +c.key + ", Value = " +c.value); } 来源： https://stackoverflow.com

What is advantage of using MVEL?

由 穿精又带淫゛_ 提交于 2019-12-11 04:02:30
问题 I'm learning jBPM engine, and what I have noticed is that it uses MVEL dialect by default in process design. So the question is: what is the advantage of using MVEL instead of pure Java? Will I have troubles with more complex processes if I'll start to program them in Java? 来源： https://stackoverflow.com/questions/13516616/what-is-advantage-of-using-mvel

how to break or continue in MVEL for / foreach loop

由 你离开我真会死。 提交于 2019-12-10 14:46:19
问题 I see MVEL supports for loop and foreach templating, but how to "break" or "continue" from the loop? 回答1: No mention of support of 'break' or 'continue' in the documentation: http://mvel.codehaus.org/MVEL+2.0+Control+Flow. The closest I could find is a user group email in 2009, stating that there's NO support of break or continue: http://markmail.org/message/rgyqvwhiedfpcchj you could still achieve the same effect as "break" this way (not the cleanest code in the world): skip_rest = false;

How to use a Spring Service in Drools rules?

由 冷暖自知 提交于 2019-12-10 14:13:38
问题 I'm working with drools engine in the construction of an alert system. we need to execute a method of a @Service instantiated by Spring Framework on the actions of the rule (RHS), when the conditions are met. What would be the way to get the @service instance created by Spring Framework to be used by the action (RHS) of the Drools rule? I have followed the following indications: Using the form import function ( Rule1.drl ). This solution does not work because the class is instantiated in

Error: expected receiver of type com.MyApp.Main, but got java.lang.Class<com.MyApp.Main>

由 三世轮回 提交于 2019-12-06 03:52:01
I'm trying to import a class into an implementation of MVEL, and I get the following error: [Error: expected receiver of type com.MyApp.Main, but got java.lang.Class] Here's the method that sets up MVEL: public void runCode() { final String theCode = "Main.sendText();"; System.setProperty("java.version", "1.6"); new Thread(new Runnable() { public void run() { ParserContext context = new ParserContext(); context.addImport("Main", Main.class); Serializable compiled = MVEL.compileExpression(theCode, context); // compile the expresion HashMap vars = new HashMap(); vars.put("x", new Integer(10));

elasticsearch aggregation using a script to transform field value being aggregated

由 爱⌒轻易说出口 提交于 2019-12-03 13:57:40
I currently have something like: "aggs": { "group_by_myfield": { "terms": { "field": "myfield" } } } However the value for myfield is "alpha 1.0", "alpha 2.0", "beta 1.0". Now I want to only aggregate over the values "alpha", "beta". How do I do that? I tried: "aggs": { "group_by_myfield": { "terms": { "field": "myfield" "script": "_value.split()[0]" } } } But I guess there is no split functionality. Any suggestions are welcome! I found a similar question here which is unanswered as well. bagi I managed to get it done using the link I pasted in my question: GET _search { "size": 0, "aggs": {

What is Mvel dialect in Drools?

由 ￣綄美尐妖づ 提交于 2019-11-30 19:52:51
I am new to Drools. I am creating a rule but I get a compile time error "field is not visible'. I've tried to check with Jboss examples, where they use dialect "mvel" . It compiled. I didn't understand about dialect. So what is dialect=mvel ? mvel , or the MVFLEX Expression Language has a rich syntax , many of which allow for more concise and expressive code (and less imperative) than java , e.g. Shorthand for get() ters / set() ters (e.g. encapsulating private fields) to be accessed in an alternative property style syntax (similar to VB or C# properties in .Net ) ie. instead of myObject

remove objects from array elastic search

由 ℡╲_俬逩灬. 提交于 2019-11-30 12:08:55
I have required to remove object from array that satisfies the condition, I am able to update the object of array on the basis of condition, which is as follow: PUT twitter/twit/1 {"list": [ { "tweet_id": "1", "a": "b" }, { "tweet_id": "123", "a": "f" } ] } POST /twitter/twit/1/_update {"script":"foreach (item :ctx._source.list) { if item['tweet_id'] == tweet_id) { item['new_field'] = 'ghi'; } }", "params": {tweet_id": 123"} } this is working for remove i am doing this POST /twitter/twit/1/_update { "script": "foreach (item : ctx._source.list) { if item['tweet_id'] == tweet_id) { ctx._source

What is Mvel dialect in Drools?

由 纵然是瞬间 提交于 2019-11-30 04:09:07
问题 I am new to Drools. I am creating a rule but I get a compile time error "field is not visible'. I've tried to check with Jboss examples, where they use dialect "mvel" . It compiled. I didn't understand about dialect. So what is dialect=mvel ? 回答1: mvel , or the MVFLEX Expression Language has a rich syntax, many of which allow for more concise and expressive code (and less imperative) than java , e.g. Shorthand for get() ters / set() ters (e.g. encapsulating private fields) to be accessed in
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