nio | Concurrent Buffered IO in Go # golang

by djherbis Go Version: v3.0.1 License: MIT

X-Ray Key Features Code Snippets(3)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | nio Summary

nio is a Go library typically used in Web Services applications. nio has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Concurrent Buffered IO in Go #golang

Support

Quality

Security

License

Reuse

Support

nio has a low active ecosystem.

It has 231 star(s) with 18 fork(s). There are 12 watchers for this library.

It had no major release in the last 12 months.

There are 0 open issues and 3 have been closed. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of nio is v3.0.1

Quality

nio has 0 bugs and 0 code smells.

Security

nio has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

nio code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

nio is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

nio releases are available to install and integrate.

Installation instructions are not available. Examples and code snippets are available.

It has 312 lines of code, 26 functions and 3 files.

It has medium code complexity. Code complexity directly impacts maintainability of the code.

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nio Key Features

No Key Features are available at this moment for nio.

nio Examples and Code Snippets

Tries to find the nearest NIO directory .

java

Lines of Code : 16

License : Permissive (MIT License)

Copy

public static Path findUsingNIOApi(String sdir) throws IOException {
        Path dir = Paths.get(sdir);
        if (Files.isDirectory(dir)) {
            Optional opPath = Files.list(dir)
              .filter(p -> !Files.isDirectory(p))

Get the total number of lines using nio .

java

Lines of Code : 15

License : Permissive (MIT License)

Copy

public static int getTotalNumberOfLinesUsingNIOFileChannel(String fileName) {
        int lines = 1;
        try (FileChannel channel = FileChannel.open(Paths.get(fileName), StandardOpenOption.READ)) {
            ByteBuffer byteBuffer = channel.map(

Returns the total number of lines using NIO files

java

Lines of Code : 10

License : Permissive (MIT License)

Copy

public static int getTotalNumberOfLinesUsingNIOFilesReadAllLines(String fileName) {
        int lines = 0;
        try {
            List fileStream = Files.readAllLines(Paths.get(fileName));
            lines = fileStream.size();
        } catch (IO

Community Discussions

Trending Discussions on nio

Parsing DNS response Answer section doesn't give expected results

spark-shell throws java.lang.reflect.InvocationTargetException on running

Jenkins/groovy: How to pretty-print a net.sf.json.JSONObject with null?

EmbeddedKafka failing since Spring Boot 2.6.X : AccessDeniedException: ..\AppData\Local\Temp\spring.kafka*

How to run spark 3.2.0 on google dataproc?

java 11 Error with Kerberos Authentication principal - KRB_CRED not generated correctly

Ktor JSON Parsing on Post Request is not working

Is the System.gc() call in sun.nio.ch.FileChannelImpl a bad case?

Calling a Java variadic function from C through the JNI

Liquibase/Springboot startup exception

QUESTION

Parsing DNS response Answer section doesn't give expected results

Asked 2022-Apr-04 at 15:33

I'm trying to parse a DNS response using java. I'm following RFC-1035 for guidelines on how to send requests and receieve responses, the format that is.

According to said RFC the answer section of a response should look like so:

...

ANSWER

Answered 2022-Apr-04 at 15:33

My problem is that I can't seem to parse the NAME in the answer section. It seems to start with a pointer which makes no sense.

I probably know at lot less about this than you but am wondering why you say that? firstByte is telling you there's a pointer and the following value (0x0c) shows you the offset of the name for compression purposes (if I've got that right). None of the other bits in the same byte as firstByte is set so that can be ignored from the point of view of the offset value

Source https://stackoverflow.com/questions/71737369

QUESTION

spark-shell throws java.lang.reflect.InvocationTargetException on running

Asked 2022-Apr-01 at 19:53

When I execute run-example SparkPi, for example, it works perfectly, but when I run spark-shell, it throws these exceptions:

...

ANSWER

Answered 2022-Jan-07 at 15:11

i face the same problem, i think Spark 3.2 is the problem itself

switched to Spark 3.1.2, it works fine

Source https://stackoverflow.com/questions/70317481

QUESTION

Jenkins/groovy: How to pretty-print a net.sf.json.JSONObject with null?

Asked 2022-Mar-31 at 11:16

Working on a Jenkins pipeline, I observed what looks like infinite recursion causing a stack overflow when I use JsonOutput.toJson() on a net.sf.json.JSONObject that slurped a JSON string containing null.

The following minimal code demonstrates the problem:

...

ANSWER

Answered 2022-Mar-31 at 11:16

Can you sidestep this immediate problem by using readJSON's returnPojo: true parameter, thereby solving your overall task sooner?

Getting plain old nulls rather than net.sf.json.JSONNull objects really helped me today, though my problem involved producing CSV rather than using JsonOutput.

Source https://stackoverflow.com/questions/71059703

QUESTION

EmbeddedKafka failing since Spring Boot 2.6.X : AccessDeniedException: ..\AppData\Local\Temp\spring.kafka*

Asked 2022-Mar-25 at 12:39

e: this has been fixed through Spring Boot 2.6.5 (see https://github.com/spring-projects/spring-boot/issues/30243)

Since upgrading to Spring Boot 2.6.X (in my case: 2.6.1), I have multiple projects that now have failing unit-tests on Windows that cannot start EmbeddedKafka, that do run with Linux

There is multiple errors, but this is the first one thrown

...

ANSWER

Answered 2021-Dec-09 at 15:51

Known bug on the Apache Kafka side. Nothing to do from Spring perspective. See more info here: https://github.com/spring-projects/spring-kafka/discussions/2027. And here: https://issues.apache.org/jira/browse/KAFKA-13391

You need to wait until Apache Kafka 3.0.1 or don't use embedded Kafka and just rely on the Testcontainers, for example, or fully external Apache Kafka broker.

Source https://stackoverflow.com/questions/70292425

QUESTION

How to run spark 3.2.0 on google dataproc?

Asked 2022-Mar-10 at 11:46

Currently, google dataproc does not have spark 3.2.0 as an image. The latest available is 3.1.2. I want to use the pandas on pyspark functionality that spark has released with 3.2.0.

I am doing the following steps to use spark 3.2.0

Created an environment 'pyspark' locally with pyspark 3.2.0 in it
Exported the environment yaml with conda env export > environment.yaml
Created a dataproc cluster with this environment.yaml. The cluster gets created correctly and the environment is available on master and all the workers
I then change environment variables. export SPARK_HOME=/opt/conda/miniconda3/envs/pyspark/lib/python3.9/site-packages/pyspark (to point to pyspark 3.2.0), export SPARK_CONF_DIR=/usr/lib/spark/conf (to use dataproc's config file) and, export PYSPARK_PYTHON=/opt/conda/miniconda3/envs/pyspark/bin/python (to make the environment packages available)

Now if I try to run the pyspark shell I get:

...

ANSWER

Answered 2022-Jan-15 at 07:17

One can achieve this by:

Create a dataproc cluster with an environment (your_sample_env) that contains pyspark 3.2 as a package
Modify /usr/lib/spark/conf/spark-env.sh by adding

Source https://stackoverflow.com/questions/70254378

QUESTION

java 11 Error with Kerberos Authentication principal - KRB_CRED not generated correctly

Asked 2022-Feb-09 at 06:03

java.sql.SQLRecoverableException: IO Error: The service in process is not supported. Operation unavailable (Mechanism level: KRB_CRED not generated correctly.)

...

ANSWER

Answered 2022-Feb-09 at 06:03

Actually a bit more information and stacktrace would have helped in debugging the issue. As per the information provided above,

This exception happens when there is a mismatch in the kerberos credential. Then GSSException occurs and this message is generated.

Source https://stackoverflow.com/questions/70327291

QUESTION

Ktor JSON Parsing on Post Request is not working

Asked 2021-Dec-26 at 03:12

Every time I send a post request from the postman and the server gives this error, even I checked if I'm receiving Content-Type = Application/ JSON. But still giving this error.

Caused by: java.lang.NoSuchMethodError: java.nio.ByteBuffer.limit(I)Ljava/nio/ByteBuffer;

Here are my files

Application File:

...

ANSWER

Answered 2021-Nov-07 at 03:58

So I Solved This Issue by Changing Project SDK 1.8 to 11.

Source https://stackoverflow.com/questions/69865527

QUESTION

Is the System.gc() call in sun.nio.ch.FileChannelImpl a bad case?

Asked 2021-Dec-23 at 15:34

try {
    // If no exception was thrown from map0, the address is valid
    addr = map0(imode, mapPosition, mapSize);
} catch (OutOfMemoryError x) {
    // An OutOfMemoryError may indicate that we've exhausted memory
    // so force gc and re-attempt map
    System.gc();
    try {
        Thread.sleep(100);
    } catch (InterruptedException y) {
        Thread.currentThread().interrupt();
    }
    try {
        addr = map0(imode, mapPosition, mapSize);
    } catch (OutOfMemoryError y) {
        // After a second OOME, fail
        throw new IOException("Map failed", y);
    }
}

...

ANSWER

Answered 2021-Dec-23 at 06:25

In the give example, the problem is insufficient memory. Thus, running the garbage collector to free up memory might remedy this. But the call to System.gc() is only a suggestion to the JVM. It is not guaranteed that that the garbage collector frees any memory through this call.

So this approach is somewhat of a heuristic.

Source https://stackoverflow.com/questions/70458298

QUESTION

Calling a Java variadic function from C through the JNI

Asked 2021-Dec-22 at 21:06

I am currently working on creating some Java bindings for a C library I work on. One of our C-structs has a char buffer that is a file system path. After calling the C function, the buffer is correctly populated. I want to take the buffer and convert it to a java.nio.file.Path member on the Java object.

I am having some trouble however. I for some reason am generating a NullPointerException within C, and I can't really see the problem.

The way to create a java.nio.file.Path object is going through java.nio.file.Paths::get().

Here is the relevant C code:

...

ANSWER

Answered 2021-Dec-22 at 21:06

The method you are trying to invoke is declared as get(String first, String... more). The variadic syntax in Java is just sugar for an array of the specified type, i.e. the two arguments of this method are really String and String[] -- which you correctly coded in the GetStaticMethodID call as (Ljava/lang/String;[Ljava/lang/String;).

So to call it you need two arguments: one String and one String[] (array) -- and (for your case) the array must contain zero elements, but such an empty array is not the same as NULL. Have a gander at NewObjectArray.

Source https://stackoverflow.com/questions/70454689

QUESTION

Liquibase/Springboot startup exception

Asked 2021-Dec-21 at 14:10

Starting yesterday (Sunday) morning my production app fails to start, with no code changes from my side. It's running Springboot 2.3.4, Liquibase-core 3.8.0 and is hosted on Amazon linux2. Funny thing is there are no exceptions locally, only when deployed.

Here is the relevant stack trace:

...

ANSWER

Answered 2021-Dec-20 at 19:35

I had the same problem. On the startup of the amazon linux 2, there is a security patch that is installed.

The package causing the problem is log4j-cve-2021-44228-hotpatch.noarch (you can check that in /var/log/yum.log)

A temporary solution is to uninstall the patch and install another java version.

Source https://stackoverflow.com/questions/70421613

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install nio

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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