在AEM中使用Elasticsearch Rest High Client问题 [英] Using Elasticsearch Rest High Client problem in AEM

问题描述

我正在尝试使用

I am trying to use Java High Level Rest Client in Adobe Experience Manager to finish project of comparison between Lucene, Solr and Elasticsearch search engines.

我在 elasticsearh实施时遇到一些问题. 这是代码:

I am having some problems with elasticsearh implementation. Here is the code:

• 父pom.xml中的依赖性(在核心pom.xml中定义了相同性)

• Dependency in the parent pom.xml (the same is defined in core pom.xml)

<!-- Elasticseach dependencies -->
<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-high-level-client</artifactId>
    <version>7.4.0</version>
</dependency>

我正在使用的唯一代码行来自上面的依赖项

The only line of code that I am using that is from dependencies above

try (RestHighLevelClient client = new 
RestHighLevelClient(RestClient.builder(new HttpHost(server, port, 
protocol),
  new HttpHost(server, secondPort, protocol)));)
{

}
catch (ElasticsearchException e)
{
    LOG.error("Exception: " + e);
}

协议="http"，服务器="localhost"，端口= 9200，secondPort = 9201

protocol = "http", server = "localhost", port = 9200, secondPort = 9201

• 错误
• 来自IntelliJ的依赖项

我知道依赖项版本通常存在问题，但是在这种情况下，所有版本均为 7.4.0 .此外，elasticsearch 7.4.0v在3个节点上本地运行.

I know that there is usually problem with dependencies versions, but all are 7.4.0 in this case. Also elasticsearch 7.4.0v is running locally on 3 nodes.

此项目是在 We.Retail 项目上完成的，因此很容易复制.同样，所有包含此错误的代码也可以在此处找到: https://github.com/tadijam64/搜索引擎比较我们/tree/elasticsearch-integration AEM 6.4v.

This project is done on We.Retail project so it is easy to replicate. Also all the code with this error is available here: https://github.com/tadijam64/search-engines-comparison-on-we-retail/tree/elasticsearch-integration AEM 6.4v.

任何信息或想法都会受到赞赏.

Any info or idea is appreciated.

更新 我尝试添加以下内容以将这些依赖项从外部嵌入，因为它们不是OSGi依赖项:

UPDATE I tried with adding the following to embed these dependencies externally since they are not OSGi dependencies:

<build>
        <plugins>
            <plugin>
                <groupId>org.apache.felix</groupId>
                <artifactId>maven-scr-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.felix</groupId>
                <artifactId>maven-bundle-plugin</artifactId>
                <extensions>true</extensions>
                <configuration>
                    <instructions>
                        <Embed-Dependency>org.apache.servicemix.bundles.solr-solrj, log4j, noggit, zookeeper,
                            elasticsearch-rest-high-level-client
                        </Embed-Dependency>
                        <Embed-Transitive>true</Embed-Transitive>
                        <Embed-Directory>OSGI-INF/lib</Embed-Directory>
                        <Export-Package>we.retail.core.model*</Export-Package>
                        <Import-Package>
                            *;resolution:=optional
                        </Import-Package>
                        <Private-Package>we.retail.core*</Private-Package>
                        <Sling-Model-Packages>
                            we.retail.core.model
                        </Sling-Model-Packages>
                    </instructions>
                </configuration>
            </plugin>
        </plugins>
    </build>

错误仍然存​​在.我还尝试将其添加到导出包"中，但没有任何帮助.

The error remains. I also tried adding it to the "export-package", but nothing helps.

并通过 Elasticsearch文档，我只需要使用

<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-high-level-client</artifactId>
    <version>7.4.0</version>
</dependency>

，但随后发生 NoClassDefFoundErrors .传递依赖似乎是一个问题.不确定，但是任何想法都会受到赞赏.

but then NoClassDefFoundErrors occurs. It seems like a problem with transitive dependencies maybe. Not sure, but any idea is appreciated.

可以在此处找到其他一些建议: https://forums.adobe.com/thread/2653586

Some other suggestions can be found here: https://forums.adobe.com/thread/2653586

我也尝试添加它的传递依赖项，例如org.elasticsearch和org.elasticsearch.client，但是它不起作用.同样的错误，只是其他类.

AEM版本6.4，Java版本:jdk1.8.0_191.jdk

AEM version 6.4, Java version: jdk1.8.0_191.jdk

推荐答案

所以我的猜测是正确的，传递依存关系不包括在Transitive> true</Embed-Transitive>中.存在.

So my guess was right, transitive dependencies were not included altho Transitive>true</Embed-Transitive> exists.

在问题 AEM 上运行 elasticsearch 作为搜索引擎时，需要执行以下操作:

The following is necessary when running elasticsearch as search engine on AEM the problem:

• 我在pom.xml中添加了所有传递依赖项(版本在parent/pom.xml中定义):

• I have added all transitive dependencies in pom.xml (versions are defined in parent/pom.xml):

<!-- Elasticsearch -->
    <dependency>
        <groupId>org.elasticsearch.client</groupId>
        <artifactId>elasticsearch-rest-high-level-client</artifactId>
    </dependency>
    <dependency>
        <groupId>org.elasticsearch.client</groupId>
        <artifactId>elasticsearch-rest-client</artifactId>
    </dependency>
    <dependency>
        <groupId>org.elasticsearch</groupId>
        <artifactId>elasticsearch</artifactId>
    </dependency>
    <dependency>
        <groupId>org.elasticsearch</groupId>
        <artifactId>elasticsearch-x-content</artifactId>
    </dependency>
    <dependency>
        <groupId>org.elasticsearch.plugin</groupId>
        <artifactId>rank-eval-client</artifactId>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-imaging</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.elasticsearch.plugin</groupId>
        <artifactId>lang-mustache-client</artifactId>
    </dependency>
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpasyncclient</artifactId>
    </dependency>

重要的是，在 maven-bundle-plugin 之内，将所有第三方依赖项添加为< Embed-Dependency >.

It is important to add all third-party dependencies as <Embed-Dependency> inside maven-bundle-plugin like this:

    <plugin>
        <groupId>org.apache.felix</groupId>
        <artifactId>maven-bundle-plugin</artifactId>
        <extensions>true</extensions>
        <configuration>
            <instructions>
                <Embed-Dependency>org.apache.servicemix.bundles.solr-solrj, noggit,
                    elasticsearch-rest-high-level-client,
                    elasticsearch,
                    elasticsearch-rest-client,
                    elasticsearch-x-content,
                    elasticsearch-core,
                    rank-eval-client,
                    lang-mustache-client,
                    httpasyncclient;
                </Embed-Dependency>
                <Embed-Transitive>true</Embed-Transitive>
                <Embed-Directory>OSGI-INF/lib</Embed-Directory>
                <Export-Package>we.retail.core.model*</Export-Package>
                <Import-Package>
                    *;resolution:=optional
                </Import-Package>
                <Private-Package>
                    we.retail.core*
                </Private-Package>
                <Sling-Model-Packages>
                    we.retail.core.model
                </Sling-Model-Packages>
                <_fixupmessages>"Classes found in the wrong directory";is:=warning</_fixupmessages>
            </instructions>
        </configuration>
    </plugin>

重要提示:

Important to notice:

• 所有第三方依赖性(OSGi之外的依赖性)必须包含在嵌入依赖性"中
• 嵌入传递"必须设置为true才能包含传递依赖项
• 导入包"必须包含"*; resolution:= optional"以排除所有无法解析的依赖项，以便程序可以运行 通常
• 由于某些原因，添加"elasticsearch"依赖项时在编译时出现了错误，对此并不重要 任务，所以我决定以这种方式忽略它:
• All third-party dependencies (the ones outside of OSGi) must be included in the "Embed-Dependency"
• "Embed-Transitive" must be set to true to include transitive dependencies
• "Import-Package" must include "*;resolution:=optional" to exclude all dependencies that could not be resolved so that program can run normally
• For some reason, there was an error in compile time when "elasticsearch" dependency was added which is not important for this task, so I've decided to ignore it this way:

<_fixupmessages>"Classes found in the wrong directory";is:=warning</_fixupmessages>

尽管遇到了挑战，但我终于解决了. Google上存在许多相似或相同的问题，因此希望对您有所帮助.感谢所有尝试提供帮助的人.

Though challenge, but I finally resolved it. There are many similar or the same problems on Google, so I hope this will help someone. Thanks to everyone that tried to help.

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