不能将java.lang.String的实例反序列化为START_OBJECT令牌 [英] Can not deserialize instance of java.lang.String out of START_OBJECT token
本文介绍了不能将java.lang.String的实例反序列化为START_OBJECT令牌的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
例外：
事件{id = 2，socket = 0c317829-69bf-43d6-b598-7c0c550635bb，type = getDashboard，data = {workstationUuid = ddec1caa-a97f-4922-833f-632da07ffc11}，reply = true}
将getDashboard事件触发Socket＃0c317829-69bf-43d6-b598-7c0c550635bb
无法调用AtmosphereFramework.doCometSupport（）
java.lang.IllegalArgumentException：无法反序列化java.lang.String中的实例，从START_OBJECT令牌
在[资料来源：N / A;行：-1，列：-1]
在org.codehaus.jackson.map.ObjectMapper._convert（ObjectMapper.java:2502）
在org.codehaus.jackson.map.ObjectMapper.convertValue（ ObjectMapper.java:2468）
at com.github.flowersinthesand.portal.support.DefaultDispatcher $ DefaultHandler $ DataParam.resolve（DefaultDispatcher.java:270）
at com.github.flowersinthesand.portal.support。 DefaultDispatcher $ DefaultHandler.handle（DefaultDispatcher.java:204）
at com.github.flowersinthesand.portal.support.DefaultDispatcher.fire（DefaultDispatcher.java:107）
at com.github.flowersinthesand.portal。 support.AbstractSocketFactory.fire（AbstractSocketFactory.java:73）
在com.github.flowersinthesand.portal.atmosphere.AtmosphereSocketFactory.onRequest（AtmosphereSocketFactory.java:75）
在org.atmosphere.cpr.AsynchronousProcessor。 action（AsynchronousProcessor.java:256）
在org.atmosphere.cpr.AsynchronousProcessor.suspended（AsynchronousProc essor.java:166）
在org.atmosphere.container.Grizzly2WebSocketSupport.service（Grizzly2WebSocketSupport.java:75）
在org.atmosphere.cpr.AtmosphereFramework.doCometSupport（AtmosphereFramework.java:1342）
在org.atmosphere.websocket.DefaultWebSocketProcessor.dispatch（DefaultWebSocketProcessor.java:219）
在org.atmosphere.websocket.DefaultWebSocketProcessor $ 2.run（DefaultWebSocketProcessor.java:183）
在org.atmosphere。 util.VoidExecutorService.execute（VoidExecutorService.java:101）
在org.atmosphere.websocket.DefaultWebSocketProcessor.dispatch（DefaultWebSocketProcessor.java:178）
在org.atmosphere.websocket.DefaultWebSocketProcessor.invokeWebSocketProtocol（DefaultWebSocketProcessor。 java：167）
在org.atmosphere.container.Grizzly2WebSocketSupport $ Grizzly2WebSocketApplication.onMessage（Grizzly2WebSocketSupport.java:171）
在org.glassfish.grizzly.websockets.DefaultWebSocket.onMessage（Defau ltWebSocket.java:164）
在org.glassfish.grizzly.websockets.frametypes.TextFrameType.respond（TextFrameType.java:70）
在org.glassfish.grizzly.websockets.DataFrame.respond（DataFrame。 java：104）
在org.glassfish.grizzly.websockets.WebSocketFilter.handleRead（WebSocketFilter.java:221）
在org.glassfish.grizzly.filterchain.ExecutorResolver $ 9.execute（ExecutorResolver.java:119 ）
在org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter（DefaultFilterChain.java:265）
在org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart（DefaultFilterChain.java:200）
在org.glassfish.grizzly.filterchain.DefaultFilterChain.execute（DefaultFilterChain.java:134）
在org.glassfish.grizzly.filterchain.DefaultFilterChain.process（DefaultFilterChain.java:112）
在org。 glassfish.grizzly.ProcessorExecutor.execute（ProcessorExecutor.java:78）
在org.glassfish.grizzly.nio.transpor t.TCPNIOTransport.fireIOEvent（TCPNIOTransport.java:770）
在org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent（AbstractIOStrategy.java:112）
在org.glassfish.grizzly.strategies.WorkerThreadIOStrategy。 run0（WorkerThreadIOStrategy.java:115）
在org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access $ 100（WorkerThreadIOStrategy.java:55）
在org.glassfish.grizzly.strategies.WorkerThreadIOStrategy $ WorkerThreadRunnable.run （WorkerThreadIOStrategy.java:135）
在org.glassfish.grizzly.threadpool.AbstractThreadPool $ Worker.doWork（AbstractThreadPool.java:551）
在org.glassfish.grizzly.threadpool.AbstractThreadPool $ Worker.run （AbstractThreadPool.java:531）
在java.lang.Thread.run（Thread.java:781）
导致：org.codehaus.jackson.map.JsonMappingException：不能反序列化java的实例。 lang.在[来源：不适用的情况下]退出START_OBJECT令牌
;行：-1，列：-1]
在org.codehaus.jackson.map.JsonMappingException.from（JsonMappingException.java:163）
在org.codehaus.jackson.map.deser.StdDeserializationContext。 mappingException（StdDeserializationContext.java:219）
在org.codehaus.jackson.map.deser.std.StringDeserializer.deserialize（StringDeserializer.java:44）
在org.codehaus.jackson.map.deser。 std.StringDeserializer.deserialize（StringDeserializer.java:13）
在org.codehaus.jackson.map.ObjectMapper._readValue（ObjectMapper.java:2704）
在org.codehaus.jackson.map.ObjectMapper。 readValue（ObjectMapper.java:1315）
在org.codehaus.jackson.map.ObjectMapper._convert（ObjectMapper.java:2498）
... 34更多
java.lang.IllegalArgumentException：不能反序列化java.lang.String的实例，从[来源：N / A;]的START_OBJECT令牌
行：-1，列：-1]状态500消息服务器错误
Socket Handler
我相信当JSON被解析为WorkstationRequest对象时发生异常，因为下面的项目。这是套接字处理程序：
@On
@Reply
@JsonView（{Views.WorkstationView。 class}）
public WorkstationDashboard getDashboard（@Data WorkstationRequest request）{
返回新的WorkstationDashboard（request.getWorkstation（））;
}
套接字处理程序映射到的对象：
public class WorkstationRequest {
/ *如果此工作站不存在，则实例化类* /
private Class&扩展工作站> workstationClass;
private WorkflowProcess workflowProcess;
私人PhysicalWorkstation工作站;
WorkstationService workstationService;
/ **
* @param workstationClass必需的，当杰克逊映射UUID时，我们可以自动获取类
* /
public WorkstationRequest（Class<？extends Workstation> ; workstationClass）{
this.workstationClass = workstationClass;
workstationService =（WorkstationService）ApplicationContextProvider.getApplicationContext（）。getBean（workstationService）;
}
/ *根据UUID设置工作站。将工作站注册为新的* /
@JsonProperty（workstationUuid）
public void setWorkstation（String workstationUUID）{
workstation =（PhysicalWorkstation）WorkstationService.getWorkstation（workstationUUID）;
//设置新工作站
if（workstation == null）{
WorkstationEntity workstationEntity = workstationService.findByUUID（workstationUUID）;
workstation =（PhysicalWorkstation）Workstation.factory（workstationEntity，workstationClass）;
//注册队列
WorkflowProcessService.getWorkflowProcess（工作站）.registerWorkstation（工作站）;
}
}
public PhysicalWorkstation getWorkstation（）{
return workstation;
}
}
正在映射的JSON：
{id：2，socket：0c317829-69bf-43d6-b598-7c0c550635bb，type：getDashboard数据：{workstationUuid：ddec1caa-a97f-4922-833f-632da07ffc11}，回复：true}
WorkstationDashboard.java
public class WorkstationDashboard {
private HashMap< ; String，Object> queue = new HashMap< String，Object>（）;
private LinkedBlockingDeque< JobSetEntity> currentWork;
public WorkstationDashboard（）{
queue.put（size，0）;
}
public WorkstationDashboard（Workstation工作站）{
fromWorkstation（workstation）;
}
/ *从工作站填充仪表板数据* /
从工作站（Workstation工作站）的public void {
WorkflowProcess workflowProcess = WorkflowProcessService.getWorkflowProcess（workstation）;
setCurrentWork（workstation.getCurrentWork（））;
setQueueSize（workflowProcess.getQueue（）。size（））;
}
public void setQueueSize（Integer queueSize）{
queue.put（size，queueSize）;
}
public HashMap< String，Object> getQueue（）{
return queue;
}
public LinkedBlockingDeque< JobSetEntity> getCurrentWork（）{
return currentWork;
}
public void setCurrentWork（LinkedBlockingDeque< JobSetEntity> currentWork）{
this.currentWork = currentWork;
}
}
我对于如何开始调试这个。堆栈跟踪从不触及我的应用程序。我正在使用 Maven - >包部署我的.jar并执行它与 java -jar /path-to-jar.jar
更新：为了防止这个问题难以置信，我已经在这里添加了我的pom.xml： http://pastebin.com/1ZUtKCfE 。我相信这是一个依赖问题，因为错误只发生在我的可部署的jar，而不是在我的本地PC上。
解决方案
重新映射这个JSON
{
id：2，
socket：0c317829- 69bf-43d6-b598-7c0c550635bb，
type：getDashboard，
data：{
workstationUuid：ddec1caa-a97f-4922-833f-632da07ffc11
}，
回复：true
}
一个名为 data 的元素，它具有一个JSON对象作为其值。您正在尝试将该JSON对象中名为 workstationUuid 的元素反序列化为此设置器。
@JsonProperty（workstationUuid）
public void setWorkstation（String workstationUUID）{
这不会直接工作，因为Jackson看到一个JSON_OBJECT，而不是String。
尝试创建一个类数据
public class Data {//名称不重要
@JsonProperty（workstationUuid）
private String workstationUuid;
// getter和setter
}
切换您的方法<
$ b
@JsonProperty（data）
public void setWorkstation（Data data）{
// use getter to检索它
I'm running into an issue where my deployable jar hits an exception that doesn't happen when I run this locally in IntelliJ.
Exception:
Receiving an event {id=2, socket=0c317829-69bf-43d6-b598-7c0c550635bb, type=getDashboard, data={workstationUuid=ddec1caa-a97f-4922-833f-632da07ffc11}, reply=true}
Firing getDashboard event to Socket#0c317829-69bf-43d6-b598-7c0c550635bb
Failed invoking AtmosphereFramework.doCometSupport()
java.lang.IllegalArgumentException: Can not deserialize instance of java.lang.String out of START_OBJECT token
at [Source: N/A; line: -1, column: -1]
at org.codehaus.jackson.map.ObjectMapper._convert(ObjectMapper.java:2502)
at org.codehaus.jackson.map.ObjectMapper.convertValue(ObjectMapper.java:2468)
at com.github.flowersinthesand.portal.support.DefaultDispatcher$DefaultHandler$DataParam.resolve(DefaultDispatcher.java:270)
at com.github.flowersinthesand.portal.support.DefaultDispatcher$DefaultHandler.handle(DefaultDispatcher.java:204)
at com.github.flowersinthesand.portal.support.DefaultDispatcher.fire(DefaultDispatcher.java:107)
at com.github.flowersinthesand.portal.support.AbstractSocketFactory.fire(AbstractSocketFactory.java:73)
at com.github.flowersinthesand.portal.atmosphere.AtmosphereSocketFactory.onRequest(AtmosphereSocketFactory.java:75)
at org.atmosphere.cpr.AsynchronousProcessor.action(AsynchronousProcessor.java:256)
at org.atmosphere.cpr.AsynchronousProcessor.suspended(AsynchronousProcessor.java:166)
at org.atmosphere.container.Grizzly2WebSocketSupport.service(Grizzly2WebSocketSupport.java:75)
at org.atmosphere.cpr.AtmosphereFramework.doCometSupport(AtmosphereFramework.java:1342)
at org.atmosphere.websocket.DefaultWebSocketProcessor.dispatch(DefaultWebSocketProcessor.java:219)
at org.atmosphere.websocket.DefaultWebSocketProcessor$2.run(DefaultWebSocketProcessor.java:183)
at org.atmosphere.util.VoidExecutorService.execute(VoidExecutorService.java:101)
at org.atmosphere.websocket.DefaultWebSocketProcessor.dispatch(DefaultWebSocketProcessor.java:178)
at org.atmosphere.websocket.DefaultWebSocketProcessor.invokeWebSocketProtocol(DefaultWebSocketProcessor.java:167)
at org.atmosphere.container.Grizzly2WebSocketSupport$Grizzly2WebSocketApplication.onMessage(Grizzly2WebSocketSupport.java:171)
at org.glassfish.grizzly.websockets.DefaultWebSocket.onMessage(DefaultWebSocket.java:164)
at org.glassfish.grizzly.websockets.frametypes.TextFrameType.respond(TextFrameType.java:70)
at org.glassfish.grizzly.websockets.DataFrame.respond(DataFrame.java:104)
at org.glassfish.grizzly.websockets.WebSocketFilter.handleRead(WebSocketFilter.java:221)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:265)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:200)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:134)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:78)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:770)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:551)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:531)
at java.lang.Thread.run(Thread.java:781)
Caused by: org.codehaus.jackson.map.JsonMappingException: Can not deserialize instance of java.lang.String out of START_OBJECT token
at [Source: N/A; line: -1, column: -1]
at org.codehaus.jackson.map.JsonMappingException.from(JsonMappingException.java:163)
at org.codehaus.jackson.map.deser.StdDeserializationContext.mappingException(StdDeserializationContext.java:219)
at org.codehaus.jackson.map.deser.std.StringDeserializer.deserialize(StringDeserializer.java:44)
at org.codehaus.jackson.map.deser.std.StringDeserializer.deserialize(StringDeserializer.java:13)
at org.codehaus.jackson.map.ObjectMapper._readValue(ObjectMapper.java:2704)
at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1315)
at org.codehaus.jackson.map.ObjectMapper._convert(ObjectMapper.java:2498)
... 34 more
java.lang.IllegalArgumentException: Can not deserialize instance of java.lang.String out of START_OBJECT token
at [Source: N/A; line: -1, column: -1] Status 500 Message Server Error
Socket Handler
I believe the exception is occurring when the JSON is parsed into a WorkstationRequest object because of the below item. This is the socket handler:
@On
@Reply
@JsonView({Views.WorkstationView.class})
public WorkstationDashboard getDashboard(@Data WorkstationRequest request) {
return new WorkstationDashboard(request.getWorkstation());
}
The object the socket handler maps to:
public class WorkstationRequest {
/* Class to instantiate if this workstation does not already exist */
private Class<? extends Workstation> workstationClass;
private WorkflowProcess workflowProcess;
private PhysicalWorkstation workstation;
WorkstationService workstationService;
/**
* @param workstationClass Required so when jackson maps the UUID we can auto fetch the class
*/
public WorkstationRequest(Class<? extends Workstation> workstationClass) {
this.workstationClass = workstationClass;
workstationService = (WorkstationService) ApplicationContextProvider.getApplicationContext().getBean("workstationService");
}
/* Set the workstation based on UUID. Will register the workstation if it's new */
@JsonProperty("workstationUuid")
public void setWorkstation(String workstationUUID) {
workstation = (PhysicalWorkstation)WorkstationService.getWorkstation(workstationUUID);
//setup new workstation
if (workstation == null) {
WorkstationEntity workstationEntity = workstationService.findByUUID(workstationUUID);
workstation = (PhysicalWorkstation)Workstation.factory(workstationEntity, workstationClass);
//register with queue
WorkflowProcessService.getWorkflowProcess(workstation).registerWorkstation(workstation);
}
}
public PhysicalWorkstation getWorkstation() {
return workstation;
}
}
The JSON being mapped:
{"id":2,"socket":"0c317829-69bf-43d6-b598-7c0c550635bb","type":"getDashboard","data":{"workstationUuid":"ddec1caa-a97f-4922-833f-632da07ffc11"},"reply":true}
WorkstationDashboard.java
public class WorkstationDashboard {
private HashMap<String, Object> queue = new HashMap<String, Object>();
private LinkedBlockingDeque<JobSetEntity> currentWork;
public WorkstationDashboard() {
queue.put("size", 0);
}
public WorkstationDashboard(Workstation workstation) {
fromWorkstation(workstation);
}
/* Populate dashboard data from a workstation */
public void fromWorkstation(Workstation workstation) {
WorkflowProcess workflowProcess = WorkflowProcessService.getWorkflowProcess(workstation);
setCurrentWork(workstation.getCurrentWork());
setQueueSize(workflowProcess.getQueue().size());
}
public void setQueueSize(Integer queueSize) {
queue.put("size", queueSize);
}
public HashMap<String, Object> getQueue() {
return queue;
}
public LinkedBlockingDeque<JobSetEntity> getCurrentWork() {
return currentWork;
}
public void setCurrentWork(LinkedBlockingDeque<JobSetEntity> currentWork) {
this.currentWork = currentWork;
}
}
I'm at quite a loss as to how to begin debugging this. The stack trace never touches my application. I'm using Maven -> Package to deploy my .jar and executing it with java -jar /path-to-jar.jar
Update: To prevent this question from being incredibly long, I've included my pom.xml here: http://pastebin.com/1ZUtKCfE. I believe this is a dependency issue since the error only occurs on my deployable jar and not on my local PC.
解决方案
You're mapping this JSON
{
"id": 2,
"socket": "0c317829-69bf-43d6-b598-7c0c550635bb",
"type": "getDashboard",
"data": {
"workstationUuid": "ddec1caa-a97f-4922-833f-632da07ffc11"
},
"reply": true
}
that contains an element named data that has a JSON object as its value. You are trying to deserialize the element named workstationUuid from that JSON object into this setter.
@JsonProperty("workstationUuid")
public void setWorkstation(String workstationUUID) {
This won't work directly because Jackson sees a JSON_OBJECT, not a String.
Try creating a class Data
public class Data { // the name doesn't matter
@JsonProperty("workstationUuid")
private String workstationUuid;
// getter and setter
}
the switch up your method
@JsonProperty("data")
public void setWorkstation(Data data) {
// use getter to retrieve it
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