I’m trying to make a get request to an Api Rest but I’m always getting 404, nevertheless if try copying queryUrl in a browser or postMan it works perfectly. restTemplate.getForObject(queryUrl, entity ,Integer.class); I’ve also tried this: HttpHeaders httpHeaders = new HttpHeaders(); httpHeaders.setContentType(MediaType.APPLICATION_JSON); HttpEntity entity = new HttpEntity(httpHeaders); log.debug(“request headers: ” + entity.getHeaders()); ResponseEntity response = restTemplate.exchange(queryUrl, HttpMethod.GET, entity, String.class); But
docker stats shows zero memory usage even for running containers
I have two containers ran by Docker Swarm: Host OS is Debian Jessie. There are JVM applications in both containers. Why does docker stats show zero memory usage? Should I configure my Java apps somehow to be able to see memory usage in docker stats? Is there some other way to check memory usage? Answer It is quite possible that
How to crop two different images in the same activity with different parameters in Android?
I am using this Crop library by SoundCloud. Selecting one imageview, slecting image, cropping and showing the result in the imageview works fine. But now I am trying to do it with two different …
java.lang.InternalError: a fault occurred in a recent unsafe memory access operation in compiled Java code
I was wondering if some of the JVM gurus out there can briefly explain the following error. What does it actually mean in technical terms and what are the sequences of events that can lead to this error? Answer This error means that sun.misc.Unsafe.getX() or putX() memory access resulted in SIGBUS error, which was then caught by JVM and translated
Is there an easy to use class for sqllite database management for java
Is there a prepared class for sqllite in java/android studio to accelerate development like Medoo in php? Answer You can use ORM database libraries. It is some of them: GreenDao Room And so on.
clear all values of hashmap except two key/value pair
I have a HashMap with hundred of key/value pairs. Now I have to delete all key/values except 2 key/value. I have use this way : But java 8 introduced removeIf() for these kind of condition. How can I solve this problem with removeIf() method ? Answer You’ll need to it like this : It will iterate over the keys and
Query-by-example skip primitives?
Spring supports creating queries by examples of the object to look for. Like: Problem: if the @Entity has primitive fields, then their default value will actually be used for creating the query. The example above will result in: SELECT * from persons where lastname := ‘Smith’ and age := 0 In my example I have a database field where age
How to escape all special characters for ffmpeg drawtext filter in java
Does anyone have a good recipe for escaping all of the special characters (‘,%,,:,{,}) from a String in java, that will be used in an ffmpeg drawtext filter chain? Trying to use replaceAll with different combinations of escaping has been an exercise in frustration! String myTextString = “Bob’s specialcool mix:stuff @ 40% off”; Runtime.getRuntime().exec(new String[] { “ffmpeg”,…., “filter_complex”, “drawtext=enable=’between(t,0,10)’:x=10:y=10:fontfile=Roboto-Black.ttf:text='” +
InvalidTypesException for Generic Pattern Transformation in Apache Flink
I have problem regarding Apache Flink. I want to have an abstract class that consumes a stream. However the pattern applied to this stream should be interchangeable. TEventType marks the type of the event that is generated from the pattern. Every pattern must implement an interface called IEventPattern The abstract class has a method called applyPatternSelectToStream() The flink compiler always
What’s the usage of the file named “conf/masters” in Flink?
Since we can specify a master by “jobmanager.rpc.address” in “flink-conf.yaml” ,what’s the usage of the file named”conf/masters”? Answer It is used for starting standalone cluster with HA mode. You can check out more here