Comment 2. In this post, I will show a simple way on how to do so. Let's get started. We need to create a new instance of JsonSlurper and call the JsonSlurper. Here is the sample code:. In our case, it is the Map data structure, but sometimes it may be something else. For further information, please refer to the JsonSlurper documentation.
Let's say you want to get a value of id from the JSON response above. JSON is a structured document, so you can get any element using its absolute path. Check out this example:. As you can see, there are two ways to get it. If you want to verify if a selected key is present in a JSON response, you can use the similar code as below:.
It is a simple check for the null — if the given key is not found, null is returned.
Groovy - JSON
For such cases, you should use more robust code:. You get all keys from the "menu" object and then check if it contains the key you are looking for. Your JSON response may also contain arrays. For example, we can get the "title" value of the first object in the "actions" array as below. In this example, we access the item with the index of 0, the first item in the array the index is zero-based. A more usual case is when you want to get the exact array element based on some specific condition.
For example, you get the "title" value of an object whose "id" is "Open. I used the for-each loop in this case. This loop checks every item in the array until the condition is met. Hopefully, these practices are useful for your API testing! Published at DZone with permission of Marek Melocik.
See the original article here. Over a million developers have joined DZone. Let's be friends:. DZone 's Guide to. Check out this post to learn more!
Free Resource. Like 5. Join the DZone community and get the full member experience. Join For Free.
Here is the sample code: import groovy.Go to Solution. View solution in original post. I should point out that most of the parentheses and spaces are not necessary; the following will work the same:. And if you want to dynamically build the code to get a specific value as a string, and then evaluate it as code, the following works:.
Thank you for the example. I have a json response containing multiple objects and I need to determine the index of the object that I want.
Thanks for the suggestion. I found though that if you have an array of elements the.
Subscribe to RSS
Switch To: SmartBear. License Portal. Sign In Register. SmartBear Support Resources. Community WFH. Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Showing results for. Search instead for. Did you mean:.
Go to solution. Start a topic. Occasional Contributor. Labels: TechCorner. Tags 1. Tags: TechCorner. All forum topics Previous Topic Next Topic. Accepted Solutions. Thank you! Join the virtual SmartBear Connect user conference on April !Go to Solution. View solution in original post. I should point out that most of the parentheses and spaces are not necessary; the following will work the same:.
And if you want to dynamically build the code to get a specific value as a string, and then evaluate it as code, the following works:. Thank you for the example. I have a json response containing multiple objects and I need to determine the index of the object that I want. Thanks for the suggestion. I found though that if you have an array of elements the. Switch To: SmartBear. License Portal. Sign In Register. SmartBear Support Resources. Community WFH. Turn on suggestions.
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Showing results for. Search instead for. Did you mean:. Go to solution. Start a topic. Occasional Contributor.Comment 1. This is necessary when creating complex JMeter autotests because Groovy provides you with more flexibility. In addition, if there are changes in the API for example, changing the URL or adding a parameteryou will only need to make the changes in one place.
In the JSR Sampler, add the following code example. You can adjust the code in your own script according to your specific needs. HttpHeaders; import org. RequestConfig; import org. HttpUriRequest; import org. RequestBuilder; import org. HttpClientBuilder; import org. EntityUtils; import org. StringEntity; import com. A "List" is a data structure in which the data is displayed as a list. In our case, the list will contain a request and a received response that will have the data type String.
String url - the path by which to send the request. In our case this is POST. Map is a data structure called "Mapping", in which data is displayed as a key-value. ConnectTimeoutException: Connect to hooks. The time is specified in milliseconds.
In our case, if no response is received within 3 seconds, then we will receive the following message: "java. SocketTimeoutException: Read timed out". If you need to set more than one header, then the setHeader method is called as many times as necessary to add headers. After running the code for execution, we get the following result in the JMeter console:. The cmd will also display the sent request and the received response, as shown in the image below.
Now, this method can be added to the JAR file and called in JMeter, which reduces the time for creating tests. The code shown above is almost identical to the code for the sendRequest method. A significant difference is the addition of parameters and values to the request, as shown below:.
All you need to do is sign up to BlazeMeterupload your JMX script, choose the number of users and locations you want to run from, and run the script.
By running your JMeter script in BlazeMeter, you can scale your tests, but also share tests and reports with team members and managers, and get advanced reporting, like this:. See the original article here. Performance Zone. Over a million developers have joined DZone. Let's be friends:. DZone 's Guide to. Free Resource. Like 5. Join the DZone community and get the full member experience.
Join For Free.The JsonSlurper class comes with a couple of variants for parser implementations. Sometimes you may have different requirements when it comes to parsing certain strings. This parsee allows comments in the JSON text as well as no quote strings etc. To specify this sort of parser you need to use JsonParserType. LAX parser type when defining an object of the JsonSlurper. The example is for getting JSON data from a web server using the http module.
For this type of traversal, the best option is to have the parser type set to JsonParserLax variant. During value conversion it copies character sub-arrays a mechanism known as "chopping" and operates on them individually.
JsonFastParser is also known as the index-overlay parser. During parsing of the given JSON String it tries as hard as possible to avoid creating new char arrays or String instances. It just keeps pointers to the underlying original character array only.
In addition, it defers object creation as late as possible. It uses a technique called "character windowing" to parse large JSON files large means files over 2MB size in this case with constant performance characteristics. When we get the object, you can see that we can actually access the values in the JSON string via the key. In the following example, we are pasing a list of integers.
You will notice from The following codethat we are able to use the List method of each and pass a closure to it. The JSON parser also supports the primitive data types of string, number, object, true, false and null. And here you can see that the JsonSlurper is able to parse the individual items into their respective primitive types. This can be done by the JsonOutput method. The JsonOutput can also be used for plain old groovy objects.
In the following example, you can see that we are actually passing objects of the type Student to the JsonOutput method. Previous Page. Next Page. Live Demo. Previous Page Print Page.Not spending too much time on the introduction, I would want to straight away dive into the same parsing which can be done using Groovy language. Groovy is a scripting language which runs on the JVM. In this example as well we would make use of the same json document described here.
Groovy support for Json was added in the 1. So you dont have to use an external API for parsing the json documents. JsonSlurper parses the given json document into a data structure of lists and maps. The model bean in this case is defined as:. As Groovy can be used a scripting language, the following code need not be compiled instead one could directly run the code by:. You would have to download and install the required binaries and libraries for running the groovy programs. More can be found at the official site.
On a closing note, the difference in the lines of code in Java and Groovy might tempt few of them to learn the syntax of the language. I am sure learning groovy is pretty easy as it has a short learning curve. Over the last few years there has been a transition to polyglot programming and with the advent of new languages which run on the JVM, they can inter-operate with an existing java application with no additional overhead.
We would over the coming days try to provide a few getting started like tutorials for Groovy and other JVM languages like Scala. In his day job he works on developing enterprise applications using ADF. He is also the moderator of JavaRanch forums and an avid blogger. Your email address will not be published. Leave a Reply Cancel reply Your email address will not be published.
Sending HTTP and HTTPS Requests Using Groovy in JMeter
Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I'm new to this, but it is very straightforward example and easy to follow. Here is the code, assuming I had imported all required dependencies. I took a look at HttpBuilder. Most of the POST examples here set the requestContentType property in the builder, which is what it looks like the code is using to get that encoder.
Try setting it like this:. I had the same problem a while ago and found a blog that noted the 'requestContentType' should be set before 'body'. Since then, I've added the comment 'Set ConentType before body or risk null pointer' in each of my httpBuilder methods.
It's not the accepted answer, but it worked for me. You may need to set the content type before you specify the 'body' attribute. It seems silly to me, but there it is. You could also use the 'send contentType, [attrs]' syntax, but I found it more difficult to unit test. Hope this helps late as it is! Learn more. Asked 8 years, 8 months ago. Active 6 years, 4 months ago. Viewed 50k times. NullPointerException at groovyx.
I'll greatly appreciate any help you can do. Rob Hruska k 26 26 gold badges silver badges bronze badges. Christopher Laconsay Christopher Laconsay 1 1 gold badge 2 2 silver badges 16 16 bronze badges. Active Oldest Votes. Try setting it like this: import groovyx.
ContentType http. JSON response. Rob Hruska Rob Hruska k 26 26 gold badges silver badges bronze badges. Thank you for the response, but still no good : java. NullPointerExceptionat groovyx. Does it work? And also, on the value of uri. Looks like you got farther along; the new NPE is when it's trying to find the appropriate response handler. The request probably failed, so you'll want a failure handler.
I'll update my example. No good at all, I'm still getting the same NPE using the example that you had provided. I think exception gets thrown before reaching the failure handler line. It worked for me.