I am having Json like this,I wanna get/read "responseCode" using Jackson,How to do this?
{
"successful":false,
"responseMessage":"direct address error: direct address is taken",
"responseCode":4610
}
Multiple ways. One is to define matching Java class with just that one field:
// either mark to ignore anything else; or specify field/setter for every property, both work
#JsonIgnoreProperties(ignoreUnknown=true)
public class Response {
public int responseCode;
}
Response resp = new ObjectMapper().readValue(json, Response.class);
int responseCode = resp.responseCode;
or, using Tree Model
JsonNode root = new ObjectMapper().readTree(json);
int responseCode = root.path("responseCode)".asIntValue();
Related
I have an MVC 4 application that sends out multiple emails. For example, I have an email template for submitting an order, a template for cancelling an order, etc...
I have an Email Service with multiple methods. My controller calls the Send method which looks like this:
public virtual void Send(List<string> recipients, string subject, string template, object data)
{
...
string html = GetContent(template, data);
...
}
The Send method calls GetContent, which is the method causing the problem:
private string GetContent(string template, object data)
{
string path = Path.Combine(BaseTemplatePath, string.Format("{0}{1}", template, ".html.cshtml"));
string content = File.ReadAllText(path);
return Engine.Razor.RunCompile(content, "htmlTemplate", null, data);
}
I am receiving the error:
The same key was already used for another template!
In my GetContent method should I add a new parameter for the TemplateKey and use that variable instead of always using htmlTemplate? Then the new order email template could have newOrderKey and CancelOrderKey for the email template being used to cancel an order?
Explanation
This happens because you use the same template key ("htmlTemplate") for multiple different templates.
Note that the way you currently have implemented GetContent you will run into multiple problems:
Even if you use a unique key, for example the template variable, you will trigger the exception when the templates are edited on disk.
Performance: You are reading the template file every time even when the template is already cached.
Solution:
Implement the ITemplateManager interface to manage your templates:
public class MyTemplateManager : ITemplateManager
{
private readonly string baseTemplatePath;
public MyTemplateManager(string basePath) {
baseTemplatePath = basePath;
}
public ITemplateSource Resolve(ITemplateKey key)
{
string template = key.Name;
string path = Path.Combine(baseTemplatePath, string.Format("{0}{1}", template, ".html.cshtml"));
string content = File.ReadAllText(path);
return new LoadedTemplateSource(content, path);
}
public ITemplateKey GetKey(string name, ResolveType resolveType, ITemplateKey context)
{
return new NameOnlyTemplateKey(name, resolveType, context);
}
public void AddDynamic(ITemplateKey key, ITemplateSource source)
{
throw new NotImplementedException("dynamic templates are not supported!");
}
}
Setup on startup:
var config = new TemplateServiceConfiguration();
config.Debug = true;
config.TemplateManager = new MyTemplateManager(BaseTemplatePath);
Engine.Razor = RazorEngineService.Create(config);
And use it:
// You don't really need this method anymore.
private string GetContent(string template, object data)
{
return Engine.Razor.RunCompile(template, null, data);
}
RazorEngine will now fix all the problems mentioned above internally. Notice how it is perfectly fine to use the name of the template as key, if in your scenario the name is all you need to identify a template (otherwise you cannot use NameOnlyTemplateKey and need to provide your own implementation).
Hope this helps.
(Disclaimer: Contributor of RazorEngine)
I would like to pass a complete JSON object to a java adapter in worklight. This adapter will call multiple other remote resources to fulfill the request. I would like to pass the json structure instead of listing out all of the parameters for a number of reasons. Invoking the worklight procedure works well. I pass the following as the parameter:
{ "parm1": 1, "parm2" : "hello" }
Which the tool is fine with. When it calls my java code, I see a object type of JSObjectConverter$1 being passed. In java debug, I can see the values in the object, but I do not see any documentation on how to do this. If memory serves me, the $1 says that it is an anonymous inner class that is being passed. Is there a better way to pass a json object/structure in adapters?
Lets assume you have this in adapter code
function test(){
var jsonObject = { "param1": 1, "param2" : "hello" };
var param2value = com.mycode.MyClass.parseJsonObject(jsonObject);
return {
result: param2value
};
}
Doesn't really matter where you're getting jsonObject from, it may come as a param from client. Worklight uses Rhino JS engine, therefore com.mycode.MyClass.parseJsonObject() function will get jsonObject as a org.mozilla.javascript.NativeObject. You can easily get obj properties like this
package com.mycode;
import org.mozilla.javascript.NativeObject;
public class MyClass {
public static String parseJsonObject(NativeObject obj){
String param2 = (String) NativeObject.getProperty(obj, "param2");
return param2;
}
}
To better explain what I'm doing here, I wanted to be able to pass a javascript object into an adapter and have it return an updated javascript object. Looks like there are two ways. The first it what I answered above a few days ago with serializing and unserializing the javascript object. The other is using the ScriptableObject class. What I wanted in the end was to use the adapter framework as described to pass in the javascript object. In doing so, this is what the Adapter JS-impl code looks like:
function add2(a) {
return {
result: com.ibm.us.roberso.Calculator.add2(a)
};
The javascript code in the client application calling the above adapter. Note that I have a function to test passing the javascript object as a parameter to the adapter framework. See the invocationData.parameters below:
function runAdapterCode2() {
// x+y=z
var jsonObject = { "x": 1, "y" : 2, "z" : "?" };
var invocationData = {
adapter : "CalculatorAdapter",
procedure : 'add2',
parameters : [jsonObject]
};
var options = {
onSuccess : success2,
onFailure : failure,
invocationContext : { 'action' : 'add2 test' }
};
WL.Client.invokeProcedure(invocationData, options);
}
In runAdapterCode2(), the javascript object is passed as you would pass any parameter into the adapter. When worklight tries to execute the java method it will look for a method signature of either taking an Object or ScriptableObject (not a NativeObject). I used the java reflection api to verify the class and hierarchy being passed in. Using the static methods on ScriptableObject you can query and modify the value in the object. At the end of the method, you can have it return a Scriptable object. Doing this will give you a javascript object back in the invocationResults.result field. Below is the java code supporting this. Please note that a good chunk of the code is there as part of the investigation on what object type is really being passed. At the bottom of the method are the few lines really needed to work with the javascript object.
#SuppressWarnings({ "unused", "rawtypes" })
public static ScriptableObject add2(ScriptableObject obj) {
// code to determine object class being passed in and its heirarchy
String result = "";
Class objClass = obj.getClass();
result = "objClass = " + objClass.getName() + "\r\n";
result += "implements=";
Class[] interfaces = objClass.getInterfaces();
for (Class classInterface : interfaces) {
result += " " + classInterface.getName() ;
}
result += "\r\nsuperclasses=";
Class superClass = objClass.getSuperclass();
while(superClass != null) {
result += " " + superClass.getName();
superClass = superClass.getSuperclass();
}
// actual code working with the javascript object
String a = (String) ScriptableObject.getProperty((ScriptableObject)obj, "z");
ScriptableObject.putProperty((ScriptableObject)obj, "z", new Long(3));
return obj;
}
Note that for javascript object, a numeric value is a Long and not int. Strings are still Strings.
Summary
There are two ways to pass in a javascript object that I've found so far.
Convert to a string in javascript, pass string to java, and have it reconstitute into a JSONObject.
Pass the javascript object and use the ScriptableObject classes to manipulate on the java side.
I have this:
public Int32 NumberOfLocationsForCompany(int companyId)
{
var response = _curl.ResetRequest()
.WithPath(LOCATION_URL)
.AddParam("companyId", companyId.ToString())
.RequestAsGet()
.ProcessRequest<Int32>();
return response;
}
that calls this at the end.
public T ProcessRequest<T>() where T : new()
{
var response = _client.Execute<T>(_request);
if (response.ErrorException != null)
{
throw response.ErrorException;
}
return response.Data;
}
but I get this error. I don't get why it's trying to map an int to a collection or why it's Int64 vs the 32 I specified.: Unable to cast object of type 'System.Int64' to type 'System.Collections.Generic.IDictionary`2[System.String,System.Object]'.
When I hit the api directly this is what I get back
<int xmlns="http://schemas.microsoft.com/2003/10/Serialization/">17</int>
I feel it's something I'm not understanding about Rest Sharp. I tell the execute method to expect an Int, it receives and int, but is trying to map it to a collection. Why and where does the collection come from?
I have noticed that when I look into the base response object's Content the appropriate result "17" is present, why can't Rest Sharp find it? and still where is it finding the Collection?
When looking at the response object I found the return value was in Content vs in Data. I found this to be true whenever I was not returning an object or list of objects.
So now when I'm expecting an int, string, bool, etc I use the following and cast the type of the return value:
public string ProcessRequestWithValue()
{
var response = _client.Execute(_request);
if (response.ErrorException != null)
{
throw response.ErrorException;
}
return response.Content;
}
Hope this helps!
I wanted to take advantage of built-in content negotiator and just get access to decision what formatter is going to be used. I don't want to use Request.Headers.Accept and check for whether it is json or xml content type because there lot of things are involved in that decision. Is there a way I can check at controller level or override any class that tells me what formatter going to be used OR what request content type is?
thanks in advance.
You can run conneg manually:
var conneg = Configuration.Services.GetContentNegotiator();
var connegResult = conneg.Negotiate(
typeof(YOUR_TYPE), Request, Configuration.Formatters
);
And use the output whichever way you want:
//the valid media type
var mediaType = connegResult.MediaType;
//do stuff
//the relevant formatter
var formatter = connegResult.Formatter;
//do stuff
If you want to see what is going on then install a TraceWriter and you will see what the conneg does.
A TraceWriter looks something like:
public class TraceWriter : ITraceWriter {
public bool IsEnabled(string category, TraceLevel level) {
return true;
}
public void Trace(HttpRequestMessage request, string category, TraceLevel level, Action<TraceRecord> traceAction) {
var rec = new TraceRecord(request, category, level);
traceAction(rec);
Log(rec);
}
private void Log(TraceRecord record) {
Console.WriteLine(record.Message);
}
}
and is installed like this,
config.Services.Replace(typeof(ITraceWriter), new TraceWriter());
If you want to manually invoke conneg then you can use,
config.Services.GetContentNegotiator().Negotiate(...)
Tugberk has a blog on this. Have a look.
I am having a minor problem with WCF service proxies where the message contains List<string> as a parameter.
I am using the 'Add Service reference' in Visual Studio to generate a reference to my service.
// portion of my web service message
public List<SubscribeInfo> Subscribe { get; set; }
public List<string> Unsubscribe { get; set; }
These are the generated properties on my MsgIn for one of my web methods.
You can see it used ArrayOfString when I am using List<string>, and the other takes List<SubscribeInfo> - which matches my original C# object above.
[System.Runtime.Serialization.DataMemberAttribute(EmitDefaultValue=false)]
public System.Collections.Generic.List<DataAccess.MailingListWSReference.SubscribeInfo> Subscribe {
get {
return this.SubscribeField;
}
set {
if ((object.ReferenceEquals(this.SubscribeField, value) != true)) {
this.SubscribeField = value;
this.RaisePropertyChanged("Subscribe");
}
}
}
[System.Runtime.Serialization.DataMemberAttribute(EmitDefaultValue=false)]
publicDataAccess.MailingListWSReference.ArrayOfString Unsubscribe {
get {
return this.UnsubscribeField;
}
set {
if ((object.ReferenceEquals(this.UnsubscribeField, value) != true)) {
this.UnsubscribeField = value;
this.RaisePropertyChanged("Unsubscribe");
}
}
}
The ArrayOfString class generated looks like this. This is a class generated in my code - its not a .NET class. It actually generated me a class that inherits from List, but didn't have the 'decency' to create me any constructors.
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.Runtime.Serialization", "3.0.0.0")]
[System.Runtime.Serialization.CollectionDataContractAttribute(Name="ArrayOfString", Namespace="http://www.example.com/", ItemName="string")]
[System.SerializableAttribute()]
public class ArrayOfString : System.Collections.Generic.List<string> {
}
The problem is that I often create my message like this :
client.UpdateMailingList(new UpdateMailingListMsgIn()
{
Email = model.Email,
Name = model.Name,
Source = Request.Url.ToString(),
Subscribe = subscribeTo.ToList(),
Unsubscribe = unsubscribeFrom.ToList()
});
I really like the clean look this gives me.
Now for the actual problem :
I cant assign a List<string> to the Unsubscribe property which is an ArrayOfString - even though it inherits from List. In fact I cant seem to find ANY way to assign it without extra statements.
I've tried the following :
new ArrayOfString(unsubscribeFrom.ToList()) - this constructor doesn't exist :-(
changing the type of the array used by the code generator - doesn't work - it always gives me ArrayOfString (!?)
try to cast List<string> to ArrayOfString - fails with 'unable to cast', even though it compiles just fine
create new ArrayOfString() and then AddRange(unsubscribeFrom.ToList()) - works, but I cant do it all in one statement
create a conversion function ToArrayOfString(List<string>), which works but isn't as clean as I want.
Its only doing this for string, which is annoying.
Am i missing something? Is there a way to tell it not to generate ArrayOfString - or some other trick to assign it ?
Any .NET object that implements a method named "Add" can be initialized just like arrays or dictionaries.
As ArrayOfString does implement an "Add" method, you can initialize it like this:
var a = new ArrayOfString { "string one", "string two" };
But, if you really want to initialize it based on another collection, you can write a extension method for that:
public static class U
{
public static T To<T>(this IEnumerable<string> strings)
where T : IList<string>, new()
{
var newList = new T();
foreach (var s in strings)
newList.Add(s);
return newList;
}
}
Usage:
client.UpdateMailingList(new UpdateMailingListMsgIn()
{
Email = model.Email,
Name = model.Name,
Source = Request.Url.ToString(),
Subscribe = subscribeTo.ToList(),
Unsubscribe = unsubscribeFrom.To<ArrayOfString>()
});
I prefer not to return generic types across a service boundary in the first place. Instead return Unsubscribe as a string[], and SubscriptionInfo as SubscriptionInfo[]. If necessary, an array can easily be converted to a generic list on the client, as follows:
Unsubscribe = new List<string>(unsubscribeFrom);
Subscribe = new List<SubscriptionInfo>(subscribeTo);
Too late but can help people in the future...
Use the svcutil and explicitly inform the command line util that you want the proxy class to be serialized by the XmlSerializer and not the DataContractSerializer (default). Here's the sample:
svcutil /out:c:\Path\Proxy.cs /config:c:\Path\Proxy.config /async /serializer:XmlSerializer /namespace:*,YourNamespace http://www.domain.com/service/serviceURL.asmx
Note that the web service is an ASP.NET web service ok?!
If you are using VS 2008 to consume service then there is an easy solution.
Click on the "Advanced..." button on the proxy dialog that is displayed when you add a Service Reference. In the Collection Type drop down you can select System.Generic.List. The methods returning List should now work properly.
(Hope this is what you were asking for, I'm a little tired and the question was a tad difficult for me to read.)