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Ich erstelle eine Server-Client-Anwendung, die über REST und HTTP kommuniziert. Mein Problem ist, ich versuche eine Aufgabe zu erstellen. Die JSON ich von den Client gesendet sieht wie folgt aus:Dokument konnte nicht gelesen werden: N/A com.fasterxml.jackson.databind.JsonMappingException
{
"taskType": "USER_STORY",
"headLine": "ew",
"taskText": "wewe",
"author": {
"id": 1,
"confirmed": false,
"email": "[email protected]",
"userName": "Daniel",
"password": "test",
"creationTime": 1466843454239,
"assignedTasks": [
{
"id": 1,
"possibleTaskTypes": [
"USER_STORY",
"TECHNICAL_STORY",
"BUG"
],
"possibleTaskContainer": [
"PRODUCT_BACKLOG",
"SELECTED_BACKLOG",
"SPRINT"
],
"taskType": "USER_STORY",
"headLine": "123",
"taskText": "fsfd",
"possibleworkFlowStati": [
"START",
"READY_FOR_ESTIMATION",
"READY_FOR_SPRINT",
"OPEN",
"IN_PROGRESS",
"DONE"
],
"author": {
"id": 1,
"confirmed": false
},
"assignee": {
"id": 1,
"confirmed": false
},
"comments": [],
"creationTime": 1466843507898
}
],
"createdTasks": [
{
"id": 1,
"possibleTaskTypes": [
"USER_STORY",
"TECHNICAL_STORY",
"BUG"
],
"possibleTaskContainer": [
"PRODUCT_BACKLOG",
"SELECTED_BACKLOG",
"SPRINT"
],
"taskType": "USER_STORY",
"headLine": "123",
"taskText": "fsfd",
"possibleworkFlowStati": [
"START",
"READY_FOR_ESTIMATION",
"READY_FOR_SPRINT",
"OPEN",
"IN_PROGRESS",
"DONE"
],
"author": {
"id": 1,
"confirmed": false
},
"assignee": {
"id": 1,
"confirmed": false
},
"comments": [],
"creationTime": 1466843507898
}
]
},
"assignee": {
"id": 1,
"confirmed": false,
"email": "[email protected]",
"userName": "Daniel",
"password": "test",
"creationTime": 1466843454239,
"assignedTasks": [
{
"id": 1,
"possibleTaskTypes": [
"USER_STORY",
"TECHNICAL_STORY",
"BUG"
],
"possibleTaskContainer": [
"PRODUCT_BACKLOG",
"SELECTED_BACKLOG",
"SPRINT"
],
"taskType": "USER_STORY",
"headLine": "123",
"taskText": "fsfd",
"possibleworkFlowStati": [
"START",
"READY_FOR_ESTIMATION",
"READY_FOR_SPRINT",
"OPEN",
"IN_PROGRESS",
"DONE"
],
"author": {
"id": 1,
"confirmed": false
},
"assignee": {
"id": 1,
"confirmed": false
},
"comments": [],
"creationTime": 1466843507898
}
],
"createdTasks": [
{
"id": 1
}
]
}
}
Die Fehlermeldung ich vom Server erhalten, ist dies:
{
"title": "Message Not Readable",
"status": 400,
"detail": "Could not read document: N/A (through reference chain: de.name.supervisor.rest.domain.Task[\"author\"]->de.name.supervisor.rest.domain.User[\"assignedTasks\"]->java.util.HashSet[0]->de.name.supervisor.rest.domain.Task[\"author\"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: N/A (through reference chain: de.name.supervisor.rest.domain.Task[\"author\"]->de.name.supervisor.rest.domain.User[\"assignedTasks\"]->java.util.HashSet[0]->de.name.supervisor.rest.domain.Task[\"author\"])","timeStamp": 1466859943472,
"developerMessage": "org.springframework.http.converter.HttpMessageNotReadableException",
"errors": {}
}
Ich habe keine Ahnung, was genau nicht funktioniert. Wenn ich einen einzelnen Benutzer poste, habe ich keine Probleme.
Das Beispiel JSON erzeugt durch Swagger-UI ist:
{
"comments": [
"string"
],
"creationTime": 0,
"possibleTaskContainer": [
"string"
],
"author": {
"password": "string",
"creationTime": 0,
"createdTasks": [
{}
],
"id": 0,
"userName": "string",
"confirmed": true,
"email": "string",
"assignedTasks": [
{}
]
},
"sprint": {
"inProgress": [
{}
],
"creationTime": 0,
"endDate": {
"dayOfWeek": "MONDAY",
"month": "JANUARY",
"year": 0,
"dayOfMonth": 0,
"era": {
"value": 0
},
"dayOfYear": 0,
"monthValue": 0,
"chronology": {
"id": "string",
"calendarType": "string"
},
"leapYear": true
},
"allTasks": [
{}
],
"sprintName": "string",
"id": 0,
"toDos": [
{}
],
"done": [
{}
],
"startDate": {
"dayOfWeek": "MONDAY",
"month": "JANUARY",
"year": 0,
"dayOfMonth": 0,
"era": {
"value": 0
},
"dayOfYear": 0,
"monthValue": 0,
"chronology": {
"id": "string",
"calendarType": "string"
},
"leapYear": true
}
},
"taskContainer": "string",
"headLine": "string",
"taskType": "string",
"id": 0,
"possibleTaskTypes": [
"string"
],
"assignee": {
"password": "string",
"creationTime": 0,
"createdTasks": [
{}
],
"id": 0,
"userName": "string",
"confirmed": true,
"email": "string",
"assignedTasks": [
{}
]
},
"possibleworkFlowStati": [
"string"
],
"taskText": "string",
"status": "string"
}
ist vielleicht das Problem, das nur durch den Client gesendet im JSON assingee und Benutzerobjekte die ID und bestätigt haben Felder? Wenn dies der Grund wäre, würde das bedeuten, dass mein Controller nicht funktioniert. Deshalb hier die Controller-Methode für die Post anfordern:
public HttpResponse postTask(Task task)throws ClientProtocolException, IOException{
HttpClient client = HttpClients.createDefault();
HttpPost post = new HttpPost(TASK_URI_V1);
Gson gson = new Gson();
String json = gson.toJson(task);
logger.info("Request-Body created: "+json);
post.setEntity(new StringEntity(json));
post.setHeader("Content-type", "application/json");
HttpResponse response = client.execute(post);
logger.info("Response from Web-Service after executing postTask request: "+response.getStatusLine().toString());
logger.info("Response Head from Web-Service after executing postTask request: "+response.toString());
logger.info("Response Body from Web-Service after executing postTask request: "+RestControllerUtils.getResponseBodyAsString(response));
return response;
}
Und hier das Benutzer-Modell des Auftraggebers:
@JsonIgnoreProperties(ignoreUnknown = true)
public class User {
public User(){};
public User(int id){
setId(new Long(id));
}
private Long id;
private boolean confirmed;
private String email;
private String userName;
private String password;
private Long creationTime;
private Set<Task> assignedTasks;
private Set<Task> createdTasks;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public boolean isConfirmed() {
return confirmed;
}
public void setConfirmed(boolean confirmed) {
this.confirmed = confirmed;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Long getCreationTime() {
return creationTime;
}
public void setCreationTime(Long creationTime) {
this.creationTime = creationTime;
}
public Set<Task> getAssignedTasks() {
return assignedTasks;
}
public void setAssignedTasks(Set<Task> assignedTasks) {
this.assignedTasks = assignedTasks;
}
public void addAssignedTasks(Task task){
addAssignedTasks(task,true);
}
void addAssignedTasks(Task task, boolean set){
if(task != null){
getAssignedTasks().add(task);
if(set){
task.setAssignee(this);
}
}
}
public void removeAssidnedTask(Task task) {
getAssignedTasks().remove(task);
task.setAssignee(null);;
}
public Set<Task> getCreatedTasks() {
return createdTasks;
}
public void setCreatedTasks(Set<Task> createdTasks) {
this.createdTasks = createdTasks;
}
public void addCreatedTask(Task task){
addCreatedTask(task,true);
}
void addCreatedTask(Task task, boolean set){
if(task != null){
getCreatedTasks().add(task);
if(set){
task.setAuthor(this);
}
}
}
public void removeCreatedTask(Task task) {
getCreatedTasks().remove(task);
task.setAuthor(null);
}
}
und das Benutzer-Modell des Servers:
@Entity
@Table(name="User")
@JsonIdentityInfo(generator=ObjectIdGenerators.IntSequenceGenerator.class,property="@id", scope = User.class)
public class User {
@Id
@GeneratedValue
@Column(name="USER_ID")
private Long id;
@Column(name="CONFIRMATION")
private boolean confirmed;
@Column(name = "EMAIL",nullable = false)
private String email;
@Column(name = "USERNAME",nullable = false)
@NotNull
private String userName;
@Column(name="PASSWORD",nullable = false)
@NotNull
private String password;
@Column(name="TIMESTAMP")
private Long creationTime;
@OneToMany(cascade={CascadeType.DETACH,CascadeType.MERGE,CascadeType.REFRESH }, mappedBy="author",fetch=FetchType.EAGER)
private Set<Task>assignedTasks;
@OneToMany(cascade={CascadeType.DETACH,CascadeType.MERGE,CascadeType.REFRESH }, mappedBy="assignee",fetch=FetchType.EAGER)
private Set<Task>createdTasks;
public User() {
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Long getCreationTime() {
return creationTime;
}
public void setCreationTime(Long creationTime) {
this.creationTime = creationTime;
}
public boolean isConfirmed() {
return confirmed;
}
public void setConfirmed(boolean confirmed) {
this.confirmed = confirmed;
}
public Set<Task> getAssignedTasks() {
return assignedTasks;
}
public void setAssignedTasks(Set<Task> assignedTasks) {
this.assignedTasks = assignedTasks;
}
public void addAssignedTasks(Task task){
addAssignedTasks(task,true);
}
void addAssignedTasks(Task task, boolean set){
if(task != null){
getAssignedTasks().add(task);
if(set){
task.setAssignee(this);
}
}
}
public void removeAssidnedTask(Task task) {
getAssignedTasks().remove(task);
task.setAssignee(null);;
}
public Set<Task> getCreatedTasks() {
return createdTasks;
}
public void setCreatedTasks(Set<Task> createdTasks) {
this.createdTasks = createdTasks;
}
public void addCreatedTask(Task task){
addCreatedTask(task,true);
}
void addCreatedTask(Task task, boolean set){
if(task != null){
getCreatedTasks().add(task);
if(set){
task.setAuthor(this);
}
}
}
public void removeCreatedTask(Task task) {
getCreatedTasks().remove(task);
task.setAuthor(null);
}
@Override
public String toString() {
return "User [id=" + id + ", confirmed=" + confirmed + ", email=" + email + ", userName=" + userName
+ ", password=" + password + "]";
}
}
Die Aufgabenklasse des Servers:
@Entity
@Table(name="Task")
//@JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property = "id")
@JsonIdentityInfo(generator=ObjectIdGenerators.IntSequenceGenerator.class,property="@id", scope = Task.class)
public class Task {
@Id
@GeneratedValue
@Column(name="TASK_ID")
private Long id;
@Transient
private List<String> possibleTaskTypes = TaskType.getTaskTypesAsString();
@Transient
private List<String>possibleTaskContainer = TaskContainer.getTaskContainerAsString();
@Column(name="TASK_Container")
private String taskContainer;
@Column(name="TASK_TYPE")
private String taskType;
@Column(name="HEAD_LINE")
private String headLine;
@Column(name="TASK_TEXT")
private String taskText;
@Transient
private List<String> possibleworkFlowStati = WorkFlowStatus.getWorkFlowsStatiAsString();
@Column(name="WORKFLOW_STATUS")
private String status;
@ManyToOne(cascade = {CascadeType.DETACH,CascadeType.MERGE,CascadeType.REFRESH })
private User author;
@ManyToOne(cascade = {CascadeType.DETACH,CascadeType.MERGE,CascadeType.REFRESH }) //TODO Check wether remove too.
private User assignee;
@Column(name="COMMENTS")
@ElementCollection(targetClass=String.class)
private List<String>comments;
@ManyToOne(cascade=CascadeType.ALL)
private Sprint sprint;
@Column(name="TIMESTAMP")
private Long creationTime;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getHeadLine() {
return headLine;
}
public void setHeadLine(String headLine) {
this.headLine = headLine;
}
public String getTaskText() {
return taskText;
}
public void setTaskText(String taskText) {
this.taskText = taskText;
}
public User getAuthor() {
return author;
}
public void setAuthor(User author) {
setAuthor(author, true);
}
void setAuthor(User author, boolean add){
this.author = author;
if(author !=null&&add){
author.addCreatedTask(this, false);
}
}
public User getAssignee() {
return assignee;
}
public void setAssignee(User assignee) {
setAssignee(assignee,true);
}
void setAssignee(User assignee, boolean add){
this.assignee = assignee;
if(assignee != null && add){
assignee.addAssignedTasks(this,false);
}
}
public List<String> getComments() {
return comments;
}
public void setComments(List<String> comments) {
this.comments = comments;
}
public Sprint getSprint() {
return sprint;
}
public void setSprint(Sprint sprint) {
this.sprint = sprint;
}
public Long getCreationTime() {
return creationTime;
}
public void setCreationTime(Long creationTime) {
this.creationTime = creationTime;
}
public String getTaskType() {
return taskType;
}
public void setTaskType(String taskType) {
this.taskType = taskType;
}
public List<String> getPossibleTaskTypes() {
return possibleTaskTypes;
}
public void setPossibleTaskTypes(List<String> possibleTaskTypes) {
this.possibleTaskTypes = possibleTaskTypes;
}
public List<String> getPossibleworkFlowStati() {
return possibleworkFlowStati;
}
public void setPossibleworkFlowStati(List<String> possibleworkFlowStati) {
this.possibleworkFlowStati = possibleworkFlowStati;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public List<String> getPossibleTaskContainer() {
return possibleTaskContainer;
}
public void setPossibleTaskContainer(List<String> possibleTaskContainer) {
this.possibleTaskContainer = possibleTaskContainer;
}
public String getTaskContainer() {
return taskContainer;
}
public void setTaskContainer(String taskContainer) {
this.taskContainer = taskContainer;
}
@Override
public String toString() {
return "Task [id=" + id + ", possibleTaskTypes=" + possibleTaskTypes + ", possibleTaskContainer="
+ possibleTaskContainer + ", taskContainer=" + taskContainer + ", taskType=" + taskType + ", headLine="
+ headLine + ", taskText=" + taskText + ", possibleworkFlowStati=" + possibleworkFlowStati + ", status="
+ status + ", author=" + author + ", assignee=" + assignee + ", comments=" + comments + ", sprint="
+ sprint + ", creationTime=" + creationTime + "]";
}
}
Ja, natürlich. Ich habe gerade den Pojos-Benutzer und die Aufgabe in der Frage-Post hinzugefügt. – n00bst3r
Ja, ich habe es mit @JsonIgnore gelöst und eine REST-Vorlage für Autor und Bearbeiter erstellt. Sie müssen sie also in einer eigenen Anfrage setzen. – n00bst3r