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hazelcast-code-samples | Hazelcast Code Samples

 by   hazelcast Java Version: Current License: No License

 by   hazelcast Java Version: Current License: No License

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kandi X-RAY | hazelcast-code-samples Summary

hazelcast-code-samples is a Java library. hazelcast-code-samples has no bugs, it has no vulnerabilities, it has build file available and it has low support. You can download it from GitHub.
Please refer to https://rawgit.com/hazelcast/hazelcast-code-samples/master/readme.html for more information.
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Quality
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Security
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kandi-support Support

  • hazelcast-code-samples has a low active ecosystem.
  • It has 509 star(s) with 575 fork(s). There are 91 watchers for this library.
  • It had no major release in the last 12 months.
  • There are 28 open issues and 33 have been closed. On average issues are closed in 87 days. There are 15 open pull requests and 0 closed requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of hazelcast-code-samples is current.
This Library - Support
Best in #Java
Average in #Java
This Library - Support
Best in #Java
Average in #Java

quality kandi Quality

  • hazelcast-code-samples has 0 bugs and 0 code smells.
This Library - Quality
Best in #Java
Average in #Java
This Library - Quality
Best in #Java
Average in #Java

securitySecurity

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

license License

  • hazelcast-code-samples does not have a standard license declared.
  • Check the repository for any license declaration and review the terms closely.
  • Without a license, all rights are reserved, and you cannot use the library in your applications.
This Library - License
Best in #Java
Average in #Java
This Library - License
Best in #Java
Average in #Java

buildReuse

  • hazelcast-code-samples releases are not available. You will need to build from source code and install.
  • Build file is available. You can build the component from source.
This Library - Reuse
Best in #Java
Average in #Java
This Library - Reuse
Best in #Java
Average in #Java
Top functions reviewed by kandi - BETA

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

  • Performs a benchmark of a Hazelcast instance .
    • Run the test
      • Starts the cluster .
        • Entry point for the Hazelcast client .
          • Deserialize the serialized fields .
            • Creates a pipeline to group events .
              • Configures the Hazelcast instance .
                • Configure the cache .
                  • Convert a row to a JSON value .
                    • Builds a pipeline from two sources .

                      Get all kandi verified functions for this library.

                      Get all kandi verified functions for this library.

                      hazelcast-code-samples Key Features

                      Hazelcast Code Samples

                      Community Discussions

                      Trending Discussions on hazelcast-code-samples
                      • UnsupportedOperationException when looping over a mapConfig created from a ClientConfig instance of Hazelcast
                      • hazelcast-kubernetes Unable to start Embedded server
                      Trending Discussions on hazelcast-code-samples

                      QUESTION

                      UnsupportedOperationException when looping over a mapConfig created from a ClientConfig instance of Hazelcast

                      Asked 2020-Dec-16 at 02:25

                      May I ask your help on how to loop over a mapConfig to change the backup-count of a running Hazelcast that is setup from a ClientConfig class?

                      I have checked the hazelcast code examples but all cases, the backup-count is set over configuration I also tried to apply the backup-count code from this stackoverflow (which, btw, was asked by myself) but I'm facing a UnsupportedOperationException because it seems a Hazelcast ClientConfig instance cannot change in runtime, is it correct? Is there any workaround for it/suggestion on how to overcome it?

                      I have the following implementation:

                      ClientConfig cfg = new ClientConfig();
                      if (hazelcastConfPath != null) {
                          cfg = new XmlClientConfigBuilder(hazelcastConfPath).build();
                      }
                      cfg.setProperty("hazelcast.logging.type", "slf4j");
                      hazelcastInstance = HazelcastClient.newHazelcastClient(cfg);
                      
                      int clusterSize = hazelcastInstance.getCluster().getMembers().size();
                      logger.info("Cluster size: {}", clusterSize);
                      
                      for (Entry<String, MapConfig> currMap : hazelcastInstance.getConfig().getMapConfigs().entrySet()) {
                          if (clusterSize - 1 > 1) {
                              try {
                                  currMap.getValue().setBackupCount(clusterSize);
                      
                              } catch (Exception e) {
                                  logger.warn(e.getMessage(), e);
                              }
                          }
                      
                          logger.info("Map {} configured with {}", currMap.getKey(), currMap.getValue().getBackupCount());
                      }
                      

                      and the Hazelcast XML configuration:

                      <?xml version="1.0" encoding="UTF-8"?>
                      <hazelcast ...>
                          <network>
                              <port auto-increment="false">${hazelcast.port}</port>
                          </network>
                          <management-center enabled="true" update-interval="3">
                              ${hazelcast.mancenter.url}
                          </management-center>
                          <group>
                              <name>${group.name}</name>
                              <password>${group.password}</password>
                          </group>
                          <map name="*token">
                              <max-idle-seconds>120</max-idle-seconds>
                              <backup-count>1</backup-count>
                              <eviction-policy>LRU</eviction-policy>
                          </map>
                          <map name="*actionSessionRedirUrlMap">
                              <max-idle-seconds>30</max-idle-seconds>
                              <backup-count>1</backup-count>
                              <eviction-policy>LRU</eviction-policy>
                          </map>
                      </hazelcast>
                      

                      Doing this, I have the UnsupportedOperationException, it seems it is not possible :'(

                      java.lang.UnsupportedOperationException: Client config object only supports adding new data structure configurations
                      at com.hazelcast.client.impl.clientside.ClientDynamicClusterConfig.getMapConfigs(ClientDynamicClusterConfig.java:591)
                      ...
                      

                      Thank You Very Much, Geraldo Netto

                      ANSWER

                      Answered 2020-Dec-16 at 02:25

                      You can achieve this either through management-center (https://docs.hazelcast.org/docs/management-center/latest/manual/html/index.html#deploying-and-starting) or by starting a lite-member with a new MapConfig having the same name but different backup count. See below for an example:

                      MapConfig mapConfig = new MapConfig("map_a");
                      mapConfig.setBackupCount(3);
                      
                      Config config = new Config();
                      config.setLiteMember(true);
                      config.addMapConfig(mapConfig);
                      
                      HazelcastInstance lite = Hazelcast.newHazelcastInstance(config);
                      

                      Source https://stackoverflow.com/questions/65287065

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

                      Vulnerabilities

                      No vulnerabilities reported

                      Install hazelcast-code-samples

                      You can download it from GitHub.
                      You can use hazelcast-code-samples like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the hazelcast-code-samples component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

                      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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