java - 设置属性以在 apache Camel 中编写 groovy 组件脚本

Question

我正在从 apache Camel 调用 groovy 脚本。当我调用 groovy 脚本时，出现以下错误:No such property: INPUTS for class: Script1。 我怎样才能克服这个问题？我尝试了 setProperty()。 setHeader 但没有运气。

from("activemq:queue:test.ChooseIManger")
     .script().groovy("resource:classpath:tests/port/test.gsh")

错误:

2017-10-02 13:42:00 DEBUG ScriptBuilder:413 - Script evaluation failed: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: INPUTS for class: Script1
javax.script.ScriptException: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: INPUTS for class: Script1
    at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:158)
    at org.apache.camel.builder.script.ScriptBuilder.runScript(ScriptBuilder.java:469)
    at org.apache.camel.builder.script.ScriptBuilder.doEvaluateScript(ScriptBuilder.java:428)
    at org.apache.camel.builder.script.ScriptBuilder.evaluateScript(ScriptBuilder.java:409)
    at org.apache.camel.builder.script.ScriptBuilder.evaluate(ScriptBuilder.java:160)
    at org.apache.camel.builder.script.ScriptBuilder.evaluate(ScriptBuilder.java:164)
    at org.apache.camel.processor.ScriptProcessor.process(ScriptProcessor.java:47)
    at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)
    at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:541)
    at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:198)
    at org.apache.camel.processor.Pipeline.process(Pipeline.java:120)
    at org.apache.camel.processor.Pipeline.process(Pipeline.java:83)
    at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:198)
    at org.apache.camel.component.timer.TimerConsumer.sendTimerExchange(TimerConsumer.java:197)
    at org.apache.camel.component.timer.TimerConsumer$1.run(TimerConsumer.java:79)
    at java.util.TimerThread.mainLoop(Timer.java:555)
    at java.util.TimerThread.run(Timer.java:505)
Caused by: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: INPUTS for class: Script1
    at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:320)
    at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:155)
    ... 16 more
Caused by: groovy.lang.MissingPropertyException: No such property: INPUTS for class: Script1
    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:53)
    at org.codehaus.groovy.runtime.callsite.PogoGetPropertySite.getProperty(PogoGetPropertySite.java:52)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGroovyObjectGetProperty(AbstractCallSite.java:307)
    at Script1.run(Script1.groovy:1)
    at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:317)
    ... 17 more

我尝试按如下方式设置属性，但遇到了相同的错误

from("activemq:queue:test.ChooseIManger").setProperty("INPUTS",constant("123")).script().groovy("resource:classpath:tests/port/test.gsh");

我知道我可以按如下方式执行此操作。但我想用 apache Camel Groovy 组件来做到这一点。

Binding binding = new Binding();
binding.setProperty("INPUTS", inputs);
binding.setProperty("RESULT", results);

GroovyShell shell = new GroovyShell(binding); 
Object script = shell.evaluate(getScript("tests/port/test.gsh"));

测试.gsh

def inputVal = INPUTS['param']

RESULT.outputVal = inputVal + 'output';

Answer 1

有一些预定义的绑定(bind):上下文、属性……

http://camel.apache.org/scripting-languages.html

在您的情况下，访问属性应该像这样(camel 2.9+):

property.resolve("INPUTS")