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aeron | Efficient reliable UDP unicast, UDP multicast

 by   real-logic Java Version: 1.38.1 License: Apache-2.0

 by   real-logic Java Version: 1.38.1 License: Apache-2.0

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kandi X-RAY | aeron Summary

aeron is a Java library typically used in Telecommunications, Media, Media, Entertainment applications. aeron has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has high support. You can download it from GitHub, Maven.
[Aeron Archive (Durable/Persistent Stream Storage)](https://github.com/real-logic/aeron/wiki/Aeron-Archive). [Aeron Cluster (Fault Tolerant Services)](https://github.com/real-logic/aeron/tree/master/aeron-cluster). [Aeron Cookbook](https://aeroncookbook.com/) by Shaun Laurens.
Support
Support
Quality
Quality
Security
Security
License
License
Reuse
Reuse

kandi-support Support

  • aeron has a highly active ecosystem.
  • It has 5954 star(s) with 729 fork(s). There are 356 watchers for this library.
  • There were 2 major release(s) in the last 6 months.
  • There are 19 open issues and 605 have been closed. On average issues are closed in 38 days. There are 2 open pull requests and 0 closed requests.
  • It has a positive sentiment in the developer community.
  • The latest version of aeron is 1.38.1
aeron Support
Best in #Java
Average in #Java
aeron Support
Best in #Java
Average in #Java

quality kandi Quality

  • aeron has 0 bugs and 0 code smells.
aeron Quality
Best in #Java
Average in #Java
aeron Quality
Best in #Java
Average in #Java

securitySecurity

  • aeron has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • aeron code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
aeron Security
Best in #Java
Average in #Java
aeron Security
Best in #Java
Average in #Java

license License

  • aeron is licensed under the Apache-2.0 License. This license is Permissive.
  • Permissive licenses have the least restrictions, and you can use them in most projects.
aeron License
Best in #Java
Average in #Java
aeron License
Best in #Java
Average in #Java

buildReuse

  • aeron releases are available to install and integrate.
  • Deployable package is available in Maven.
  • Build file is available. You can build the component from source.
  • Installation instructions, examples and code snippets are available.
  • It has 114916 lines of code, 7214 functions and 680 files.
  • It has high code complexity. Code complexity directly impacts maintainability of the code.
aeron Reuse
Best in #Java
Average in #Java
aeron Reuse
Best in #Java
Average in #Java
Top functions reviewed by kandi - BETA

kandi has reviewed aeron and discovered the below as its top functions. This is intended to give you an instant insight into aeron implemented functionality, and help decide if they suit your requirements.

  • Creates the publication image .
  • print command
  • Append a fragment to the buffer .
  • Checks that a segment file is invalid .
  • Tries to parse an IPv6 string .
  • Handles a new leadership term .
  • Method to plan recovery log .
  • Cancels the connection .
  • Find the offset for the start of a file .
  • Prints back to stream .

aeron Key Features

[Java Programming Guide](https://github.com/real-logic/aeron/wiki/Java-Programming-Guide)

[C++11 Programming Guide](https://github.com/real-logic/aeron/wiki/Cpp-Programming-Guide)

[Best Practices Guide](https://github.com/real-logic/aeron/wiki/Best-Practices-Guide)

[Monitoring and Debugging](https://github.com/real-logic/aeron/wiki/Monitoring-and-Debugging)

[Configuration Options](https://github.com/real-logic/aeron/wiki/Configuration-Options)

[Channel Specific Configuration](https://github.com/real-logic/aeron/wiki/Channel-Configuration)

[Aeron Archive (Durable/Persistent Stream Storage)](https://github.com/real-logic/aeron/wiki/Aeron-Archive)

[Aeron Cluster (Fault Tolerant Services)](https://github.com/real-logic/aeron/tree/master/aeron-cluster)

[Aeron Cookbook](https://aeroncookbook.com/) by Shaun Laurens.

Java Build

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    $ ./gradlew

C++ Build

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    $ ./cppbuild/cppbuild

Running Samples

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    $ java -cp aeron-all/build/libs/aeron-all-${VERSION}.jar io.aeron.driver.MediaDriver

Media Driver Packaging

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aeron-driver/build/distributions/aeron-driver-${VERSION}.zip

Troubleshooting

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```
 java.lang.InternalError(a fault occurred in a recent unsafe memory access operation in compiled Java code)
```

License (See LICENSE file for full license)

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https://www.apache.org/licenses/LICENSE-2.0

Is it possible to add members to Aeron Cluster w/o reconfiguring existing ones?

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ConsensusModule.Context()
    .errorHandler(errorHandler("Consensus Module"))
    .clusterMemberId(Aeron.NULL_VALUE) // <1>
    .clusterMembers("") // <2>
    .memberEndpoints(memberEndpoints(hostnames[nodeId], nodeId)) // <3>
    .clusterConsensusEndpoints(consensusEndpoints(hostnames)) // <4>
    .clusterDir(File(baseDir, "consensus-module"))
    .ingressChannel("aeron:udp?term-length=64k")
    .logChannel("aeron:udp?term-length=64k")
    .replicationChannel(logReplicationChannel(hostname))
    .archiveContext(aeronArchiveContext.clone())

Aeron - Issues with Multicast across Switches

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java '-Daeron.sample.channel=aeron:udp?endpoint=224.0.1.1:40123|interface=192.168.1.0/24|ttl=16' -Daeron.sample.embeddedMediaDriver=true -cp ./lib/aeron-all-1.29.0.jar io.aeron.samples.BasicPublisher
java '-Daeron.sample.channel=aeron:udp?endpoint=224.0.1.1:40123|interface=192.168.9.0/24|ttl=16' -Daeron.sample.embeddedMediaDriver=true -cp ./lib/aeron-all-1.29.0.jar io.aeron.samples.BasicSubscriber
-----------------------
java '-Daeron.sample.channel=aeron:udp?endpoint=224.0.1.1:40123|interface=192.168.1.0/24|ttl=16' -Daeron.sample.embeddedMediaDriver=true -cp ./lib/aeron-all-1.29.0.jar io.aeron.samples.BasicPublisher
java '-Daeron.sample.channel=aeron:udp?endpoint=224.0.1.1:40123|interface=192.168.9.0/24|ttl=16' -Daeron.sample.embeddedMediaDriver=true -cp ./lib/aeron-all-1.29.0.jar io.aeron.samples.BasicSubscriber

How can I embed the Aeron driver JAR in a Rust program and start it later?

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fn main() -> std::io::Result<()> {
    let driver_path = extract_driver();

    if cfg!(target_os = "windows") {
        let mut command = String::from("%JAVA_HOME%\\bin\\java -cp ");
        command.push_str(driver_path.as_str());
        command.push_str("%JVM_OPTS% io.aeron.driver.MediaDriver %*");
        Command::new("cmd")
            .args(&["/C", command.as_str()])
            .spawn()
            .expect("Error spawning Aeron driver process")
    } else {
        let mut command = String::from("${JAVA_HOME}/bin/java -cp ");
        command.push_str(driver_path.as_str());
        command.push_str("${JVM_OPTS} io.aeron.driver.MediaDriver \"$@\"");
        Command::new("sh")
            .arg("-c")
            .arg(command.as_str())
            .spawn()
            .expect("Error spawning Aeron driver process")
    };
}

fn extract_driver() -> String {
    let bytes = include_bytes!("aeron-all-1.32.0-SNAPSHOT.jar");
    let mut driver_path = temp_dir();
    driver_path.push("aeron-driver.jar");
    let mut file = File::create(driver_path.to_owned()).expect("Error extracting Aeron driver jar");
    file.write_all(bytes).unwrap();
    String::from(driver_path.to_str().unwrap())
}

Different results for transport benchmarks

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   Run time: 5.0s
   Correcting for co-ordinated:true
   Target throughput:10000/s = 1 message every 100us
   End to End: (50,000)       50/90 99/99.9 99.99 - worst was 14 / 16  20 / 1,660  3,770 - 4,010
   OS Jitter (5,853)          50/90 99/99.9 99.99 - worst was 1.8 / 7.0  30 / 181  3,770 - 3,770

UDP library for Java that works garbage free

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import java.lang.System;

public class UdpNoGc {
    public static void main(String[] args) throws Exception {
        var buf = new byte[1024];
        var pkt = new java.net.DatagramPacket(buf, buf.length);

        try (var sock = new java.net.DatagramSocket(4321)) {
            for (;;) {
                sock.receive(pkt);

                System.out.write(buf, 0, pkt.getLength());

                System.gc();
            }
        }
    }
}
java "-Xlog:gc,heap*" UdpNoGc
-----------------------
import java.lang.System;

public class UdpNoGc {
    public static void main(String[] args) throws Exception {
        var buf = new byte[1024];
        var pkt = new java.net.DatagramPacket(buf, buf.length);

        try (var sock = new java.net.DatagramSocket(4321)) {
            for (;;) {
                sock.receive(pkt);

                System.out.write(buf, 0, pkt.getLength());

                System.gc();
            }
        }
    }
}
java "-Xlog:gc,heap*" UdpNoGc

Aeron basic pub/sub pair connects on same host, fails across hosts

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aeron:udp?endpoint=224.0.1.1:40456|interface=192.168.1.4
aeron:udp?endpoint=224.0.1.1:40456|interface=192.168.1.0/24

OneToManyRingBuffer implementation in agrona

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// Create broadcast buffer
int capacity = 1 << 10; // Must be power of two
int bufferSize = capacity + BroadcastBufferDescriptor.TRAILER_LENGTH;
UnsafeBuffer broadcastBuffer = new UnsafeBuffer(new byte[bufferSize]);

// Create transmitter
BroadcastTransmitter transmitter = new BroadcastTransmitter(broadcastBuffer);

// Create receiver (can create many of these)
BroadcastReceiver broadcastReceiver = new BroadcastReceiver(broadcastBuffer);
CopyBroadcastReceiver copyBroadcastReceiver = new CopyBroadcastReceiver(broadcastReceiver);

// Send message
int msgTypeId = 1;
MutableDirectBuffer msgBuffer = new ExpandableArrayBuffer();
int msgLength = msgBuffer.putStringWithoutLengthAscii(0, "Hello World!");
transmitter.transmit(msgTypeId, msgBuffer, 0, msgLength);

// Receive message
copyBroadcastReceiver.receive(
  (msgType, buffer, offset, length) -> System.out.println(buffer.getStringWithoutLengthAscii(offset, length)));

How to set limit on Aeron subscriber and publisher count while Running Aeron Samples

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$JAVA_HOME/bin/java -cp /src/aeron-all/build/libs/aeron-all-1.27.0.jar -Daeron.sample.messages=100 io.aeron.samples.BasicPublisher &

setFormula by using script in Google Sheets

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function setFormula() {
  var ss = SpreadsheetApp.getActiveSpreadsheet().getSheetByName('Sheet1');
  var rangeList = ss.getRange('d1:f1').getValues()[0];
  var range = ss.getRange('d2:f2');
  range.setFormulas([rangeList.map(function(e) {return '={'+e+'!F2:F}'})]);
}

What are error's regarding Beautiful Soup?

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from selenium import webdriver
from selenium.webdriver.firefox.options import Options
import pandas as pd

options = Options()
options.add_argument('--headless')
driver = webdriver.Firefox(options=options)

driver.get("https://www.moneycontrol.com/stocks/marketstats/industry-classification/bse/aerospace-defence.html")


df = pd.read_html(driver.page_source)[0]

print(df)
df.to_csv("result.csv", index=False)

driver.quit()
                                        Company Name  ...  5 Day Performance -18.45 (-2.7%)  03-Mar-20  6...  5 Day Performance  Volume  Lower Circuit  Upper Circuit  VWAP  SMA Deliver -0.3 (-0.19%)  03-Mar-20  15...ables  P/E  P/B                                                             0.55 (2.26%)  03-Mar-20  24.4...
0  Hindustan Aeron  Add to  Watchlist | Portfolio...  ...  02-Mar-20  666.10 -18.45 (-2.7%)  03-Mar-20  6...
1  TAAL Enterprise  Add to  Watchlist | Portfolio...  ...  02-Mar-20  160.00 -0.3 (-0.19%)  03-Mar-20  15...
2  Taneja Aerospac  Add to  Watchlist | Portfolio...  ...  02-Mar-20  24.90 
0.55 (2.26%)  03-Mar-20  24.4...

[3 rows x 9 columns]
-----------------------
from selenium import webdriver
from selenium.webdriver.firefox.options import Options
import pandas as pd

options = Options()
options.add_argument('--headless')
driver = webdriver.Firefox(options=options)

driver.get("https://www.moneycontrol.com/stocks/marketstats/industry-classification/bse/aerospace-defence.html")


df = pd.read_html(driver.page_source)[0]

print(df)
df.to_csv("result.csv", index=False)

driver.quit()
                                        Company Name  ...  5 Day Performance -18.45 (-2.7%)  03-Mar-20  6...  5 Day Performance  Volume  Lower Circuit  Upper Circuit  VWAP  SMA Deliver -0.3 (-0.19%)  03-Mar-20  15...ables  P/E  P/B                                                             0.55 (2.26%)  03-Mar-20  24.4...
0  Hindustan Aeron  Add to  Watchlist | Portfolio...  ...  02-Mar-20  666.10 -18.45 (-2.7%)  03-Mar-20  6...
1  TAAL Enterprise  Add to  Watchlist | Portfolio...  ...  02-Mar-20  160.00 -0.3 (-0.19%)  03-Mar-20  15...
2  Taneja Aerospac  Add to  Watchlist | Portfolio...  ...  02-Mar-20  24.90 
0.55 (2.26%)  03-Mar-20  24.4...

[3 rows x 9 columns]

Community Discussions

Trending Discussions on aeron
  • Aeron publication side concurrency issue on singleton request buffer
  • C++ Build Windows build fatal error LNK1104 gmock.lib
  • What type of message delivery guarantees Aeron can provide?
  • Can Aeron lose messages?
  • Does the Aeron C Media Driver support Clustering capabilities?
  • Is it possible to add members to Aeron Cluster w/o reconfiguring existing ones?
  • Is it possible to replay from Aeron Cluster?
  • What is the difference between RSocket + TCP and RSocket + WebSocket?
  • Aeron - Issues with Multicast across Switches
  • Aeron: should Archive taggedReplicate work with C Media Driver?
Trending Discussions on aeron

QUESTION

Aeron publication side concurrency issue on singleton request buffer

Asked 2022-Mar-15 at 09:06

is there any best practice to handle concurrency on publish side?? assume that we have a client that wants to handle 1 Million concurrent requests, these requests must send to the Aeron server-side via publication offer. now we have a singleton expandable array buffer that overwrites and is corrupted by concurrency.

ANSWER

Answered 2022-Mar-14 at 19:29

From the description of the problem, you should benefit from using https://github.com/real-logic/agrona/blob/master/agrona/src/main/java/org/agrona/concurrent/ringbuffer/ManyToOneRingBuffer.java and then implement the MessageHandler that makes use of io.aeron.ExclusivePublication#offer.

Source https://stackoverflow.com/questions/71473118

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

Vulnerabilities

No vulnerabilities reported

Install aeron

Build the project with [Gradle](http://gradle.org/) using this [build.gradle](https://github.com/real-logic/aeron/blob/master/build.gradle) file.
[JDK 8](https://adoptopenjdk.net/index.html) or later, Java versions before 1.8.0_65 are very buggy and can cause tests to fail.
You require the following to build the C++ API for Aeron:. Note: Aeron support is available for 64-bit Linux, OSX, and Windows. For convenience, the cppbuild script does a full clean, build, and test of all targets as a Release build.
3.6.1 or higher of [CMake](http://www.cmake.org/)
C++11 supported compiler for the supported platform
C11 supported compiler for the supported platform
Requirements to build [HdrHistogram_c](https://github.com/HdrHistogram/HdrHistogram_c).
JDK 8 or later to compile the SBE schema definitions used by the archive client.

Support

On linux, the subscriber sample throws an exception.

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