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为什么我不能用自己的方法包装 withRest() 并在其中运行闭包？

发布于 2024-12-22 04:20:02 字数 12682 浏览 2 评论 0原文

Griffon 的 HTTPBuilder 插件很棒，它很好地简化了我的服务器调用。然而，唯一的问题是我不想在各处重复相同的设置代码。

我想要做的是使用相同的连接设置包装一组服务器调用和其他代码，以便我只将其放在一个地方。

作为一个例子，这就是我所拥有的：

def persistCurrentSession() {
    withRest(uri: serverBaseURL) {
        headers = requestHeaders

        post(path: "${sessionBaseURL}${currentSession.id}",
                body: currentSession,
                requestContentType: groovyx.net.http.ContentType.JSON)
    }
}

def refreshCurrentSession() {
    withRest(uri: serverBaseURL) {
        headers = requestHeaders

        currentSession = get(path: "${sessionBaseURL}${currentSession.id}").responseData.sessionInstance
    }
}

这就是我想做的：

def persistCurrentSession() {
    withMyRest {
        post(path: "${sessionBaseURL}${currentSession.id}",
                body: currentSession,
                requestContentType: groovyx.net.http.ContentType.JSON)
    }
}

def refreshCurrentSession() {
    withMyRest {
        currentSession = get(path: "${sessionBaseURL}${currentSession.id}").responseData.sessionInstance
    }
}

def withMyRest(Closure stmts) {
    withRest(uri: serverBaseURL) {
        headers = requestHeaders
        stmts()
    }
}

根据我对 Groovy 和闭包的了解，这应该是闭包的一个很好的用途，因为它消除了常见的“设置/拆除资源”代码到一个地方，并允许重点关注服务器调用的核心内容。

问题是，动态方法似乎没有被正确添加，因为当我按照我想要的方式运行代码设置时，当 stmts( ) 被调用：

2011-12-20 11:12:40,097 [pool-2-thread-1] ERROR griffon.util.GriffonExceptionHandler - Uncaught Exception
org.codehaus.groovy.runtime.InvokerInvocationException: groovy.lang.MissingMethodException: No signature of method: client.MyAppServerService.post() is applicable for argument types: (java.util.LinkedHashMap) values: [[path:http://localhost:8080/Server/session/4, ...]]
Possible solutions: wait(), wait(long), print(java.lang.Object), use([Ljava.lang.Object;), is(java.lang.Object), split(groovy.lang.Closure)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:97)
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1053)
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:1071)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:883)
    at groovy.lang.Closure.call(Closure.java:410)
    at groovy.lang.Closure.call(Closure.java:404)
    at groovy.lang.Closure.run(Closure.java:488)
    at org.codehaus.griffon.runtime.util.AbstractUIThreadHandler$1.run(AbstractUIThreadHandler.java:41)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)
Caused by: groovy.lang.MissingMethodException: No signature of method: client.MyAppServerService.post() is applicable for argument types: (java.util.LinkedHashMap) values: [[path:http://localhost:8080/Server/session/4, ...]]
Possible solutions: wait(), wait(long), print(java.lang.Object), use([Ljava.lang.Object;), is(java.lang.Object), split(groovy.lang.Closure)
    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:55)
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:78)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
    at client.MyAppServerService$_persistCurrentSession_closure2.doCall(MyAppServerService.groovy:49)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSite.invoke(PogoMetaMethodSite.java:226)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:52)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
    at client.MyAppServerService$_persistCurrentSession_closure2.doCall(MyAppServerService.groovy)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1053)
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:1071)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:883)
    at groovy.lang.Closure.call(Closure.java:410)
    at groovy.lang.Closure.call(Closure.java:404)
    at java_util_concurrent_Callable$call.call(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:112)
    at client.MyAppServerService$_withMyRest_closure4.doCall(MyAppServerService.groovy:71)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSite.invoke(PogoMetaMethodSite.java:226)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:52)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
    at client.MyAppServerService$_withMyRest_closure4.doCall(MyAppServerService.groovy)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1053)
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:1071)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:883)
    at groovy.lang.Closure.call(Closure.java:410)
    at groovy.lang.Closure.call(Closure.java:404)
    at java_util_concurrent_Callable$call.call(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
    at java_util_concurrent_Callable$call.call(Unknown Source)
    at griffon.plugins.rest.RestConnector.doWithBuilder(RestConnector.groovy:90)
    at griffon.plugins.rest.RestConnector.this$2$doWithBuilder(RestConnector.groovy)
    at griffon.plugins.rest.RestConnector$this$2$doWithBuilder.callCurrent(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at griffon.plugins.rest.RestConnector$this$2$doWithBuilder.callCurrent(Unknown Source)
    at griffon.plugins.rest.RestConnector.withRest(RestConnector.groovy:67)
    at griffon.plugins.rest.RestConnector$withRest.call(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
    at griffon.plugins.rest.RestConnector$withRest.call(Unknown Source)
    at griffon.plugins.rest.RestConnector$_enhance_closure5.doCall(RestConnector.groovy:49)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
    at org.codehaus.groovy.runtime.metaclass.ClosureMetaMethod.invoke(ClosureMetaMethod.java:80)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoMetaMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:308)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:52)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:145)
    at client.MyAppServerService.withMyRest(MyAppServerService.groovy:68)
    at client.MyAppServerService$withMyRest.callCurrent(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
    at client.MyAppServerService.persistCurrentSession(MyAppServerService.groovy:48)
    at client.MyAppServerService$persistCurrentSession.callCurrent(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:137)
    at client.MyAppServerService.closeSession(MyAppServerService.groovy:41)
    at client.MyAppServerService$closeSession.call(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:112)
    at client.StartController$_closure1_closure2.doCall(StartController.groovy:20)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSite.invoke(PogoMetaMethodSite.java:226)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:52)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
    at client.StartController$_closure1_closure2.doCall(StartController.groovy)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
    ... 14 more

我确信有更好的方法来完成我正在尝试的事情，但即便如此，我认为我正在尝试做的事情应该有效。我对 Groovy 还很陌生，但我已经多次讨论了作用域规则，我能想到的只是 HTTPBuilder 的动态方法没有通过传递的闭包正确附加，或者类似的东西

原文

The HTTPBuilder plugin for Griffon is great and it simplifies my server calls quite well. The only problem, however, is that I don't want to have to keep repeating the same setup code all over the place.

What I want to do is wrap a set of server calls and other code with the same connection setup so that I only have it in one place.

As an example, this is what I have:

def persistCurrentSession() {
    withRest(uri: serverBaseURL) {
        headers = requestHeaders

        post(path: "${sessionBaseURL}${currentSession.id}",
                body: currentSession,
                requestContentType: groovyx.net.http.ContentType.JSON)
    }
}

def refreshCurrentSession() {
    withRest(uri: serverBaseURL) {
        headers = requestHeaders

        currentSession = get(path: "${sessionBaseURL}${currentSession.id}").responseData.sessionInstance
    }
}

And this is what I want to do:

def persistCurrentSession() {
    withMyRest {
        post(path: "${sessionBaseURL}${currentSession.id}",
                body: currentSession,
                requestContentType: groovyx.net.http.ContentType.JSON)
    }
}

def refreshCurrentSession() {
    withMyRest {
        currentSession = get(path: "${sessionBaseURL}${currentSession.id}").responseData.sessionInstance
    }
}

def withMyRest(Closure stmts) {
    withRest(uri: serverBaseURL) {
        headers = requestHeaders
        stmts()
    }
}

From what I know about Groovy and closures, this should be a great use for closures, since it removes the common "set up / tear down resources" code to a single place and allows the focus to be on the meat of the server calls.

The problem is that it doesn't seem like the dynamic methods are being properly added because when I run the code set up the way I want to have it, MissingMethodExceptions get thrown when stmts() gets called:

2011-12-20 11:12:40,097 [pool-2-thread-1] ERROR griffon.util.GriffonExceptionHandler - Uncaught Exception
org.codehaus.groovy.runtime.InvokerInvocationException: groovy.lang.MissingMethodException: No signature of method: client.MyAppServerService.post() is applicable for argument types: (java.util.LinkedHashMap) values: [[path:http://localhost:8080/Server/session/4, ...]]
Possible solutions: wait(), wait(long), print(java.lang.Object), use([Ljava.lang.Object;), is(java.lang.Object), split(groovy.lang.Closure)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:97)
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1053)
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:1071)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:883)
    at groovy.lang.Closure.call(Closure.java:410)
    at groovy.lang.Closure.call(Closure.java:404)
    at groovy.lang.Closure.run(Closure.java:488)
    at org.codehaus.griffon.runtime.util.AbstractUIThreadHandler$1.run(AbstractUIThreadHandler.java:41)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)
Caused by: groovy.lang.MissingMethodException: No signature of method: client.MyAppServerService.post() is applicable for argument types: (java.util.LinkedHashMap) values: [[path:http://localhost:8080/Server/session/4, ...]]
Possible solutions: wait(), wait(long), print(java.lang.Object), use([Ljava.lang.Object;), is(java.lang.Object), split(groovy.lang.Closure)
    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:55)
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:78)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
    at client.MyAppServerService$_persistCurrentSession_closure2.doCall(MyAppServerService.groovy:49)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSite.invoke(PogoMetaMethodSite.java:226)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:52)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
    at client.MyAppServerService$_persistCurrentSession_closure2.doCall(MyAppServerService.groovy)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1053)
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:1071)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:883)
    at groovy.lang.Closure.call(Closure.java:410)
    at groovy.lang.Closure.call(Closure.java:404)
    at java_util_concurrent_Callable$call.call(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:112)
    at client.MyAppServerService$_withMyRest_closure4.doCall(MyAppServerService.groovy:71)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSite.invoke(PogoMetaMethodSite.java:226)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:52)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
    at client.MyAppServerService$_withMyRest_closure4.doCall(MyAppServerService.groovy)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1053)
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:1071)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:883)
    at groovy.lang.Closure.call(Closure.java:410)
    at groovy.lang.Closure.call(Closure.java:404)
    at java_util_concurrent_Callable$call.call(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
    at java_util_concurrent_Callable$call.call(Unknown Source)
    at griffon.plugins.rest.RestConnector.doWithBuilder(RestConnector.groovy:90)
    at griffon.plugins.rest.RestConnector.this$2$doWithBuilder(RestConnector.groovy)
    at griffon.plugins.rest.RestConnector$this$2$doWithBuilder.callCurrent(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at griffon.plugins.rest.RestConnector$this$2$doWithBuilder.callCurrent(Unknown Source)
    at griffon.plugins.rest.RestConnector.withRest(RestConnector.groovy:67)
    at griffon.plugins.rest.RestConnector$withRest.call(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
    at griffon.plugins.rest.RestConnector$withRest.call(Unknown Source)
    at griffon.plugins.rest.RestConnector$_enhance_closure5.doCall(RestConnector.groovy:49)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
    at org.codehaus.groovy.runtime.metaclass.ClosureMetaMethod.invoke(ClosureMetaMethod.java:80)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoMetaMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:308)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:52)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:145)
    at client.MyAppServerService.withMyRest(MyAppServerService.groovy:68)
    at client.MyAppServerService$withMyRest.callCurrent(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
    at client.MyAppServerService.persistCurrentSession(MyAppServerService.groovy:48)
    at client.MyAppServerService$persistCurrentSession.callCurrent(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:137)
    at client.MyAppServerService.closeSession(MyAppServerService.groovy:41)
    at client.MyAppServerService$closeSession.call(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:112)
    at client.StartController$_closure1_closure2.doCall(StartController.groovy:20)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSite.invoke(PogoMetaMethodSite.java:226)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:52)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
    at client.StartController$_closure1_closure2.doCall(StartController.groovy)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
    ... 14 more

I'm sure there are better ways to do what I'm trying for, but even so, what I'm trying to do should work, I think. I'm still quite new to Groovy, but I've gone over the scope rules a bunch of times and all I can think of is that the dynamic methods for the HTTPBuilder are not being properly attached through the passed closures, or something like that

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独闯女儿国 2024-12-29 04:20:02

看起来正在发生的事情是关闭委托迷失了。委托是常规闭包工作方式的重要组成部分。每个闭包都有一个与其关联的委托对象，并且可以在委托上调用闭包内调用的任何方法。确切的顺序可以通过 Closure.setResolveStrategy 自定义，但默认情况是首先尝试所有者（声明闭包的地方）的方法，然后是委托。您始终可以使用 delegate 在闭包内显式引用委托。

委托是提供像 setHeaders() 这样神奇的动态方法的主要机制。当 HttpBuilder 调用您传入的闭包时，它会设置显式闭包的委托，但会跳过 stmts() 。您所需要做的就是将委托传递给 stmts()。尝试这样的事情：

def withMyRest(Closure stmts) {
    withRest(uri: serverBaseURL) {
        headers = requestHeaders
        stmts.delegate = delegate
        stmts()
    }
}

It looks like what's happening is the closure delegate is getting lost. Delegates are an important part of how groovy closures work. Each closure has a delegate object associated with it, and any methods called within the closure can be invoked on the delegate. The exact order is customizable with Closure.setResolveStrategy, but the default is to try the method on the owner (where the closure is declared) first, then the delegate. You can always reference the delegate explicitly inside a closure with delegate.

Delegates are the main mechanism for providing those magic dynamic methods like setHeaders(). When HttpBuilder calls the closure you pass in, it sets the explicit closure's delegate, but stmts() gets skipped. All you need to do is pass on the delegate to stmts(). Try something like this:

def withMyRest(Closure stmts) {
    withRest(uri: serverBaseURL) {
        headers = requestHeaders
        stmts.delegate = delegate
        stmts()
    }
}
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