使用 Jboss DMR 下载/保存附件

Posted 2023-02-19

【中文标题】使用 Jboss DMR 下载/保存附件

【英文标题】：Download/Save attachment using Jboss DMR

【发布时间】：2021-04-27 09:08:39

【问题描述】：

我有一个 Jboss CLI 命令，我正在尝试使用 DMR 库在 Java 中实现它。该步骤涉及下载附件（显示/保存），但是任何地方都没有可用的文档。任何帮助表示赞赏。

我正在尝试转换为 DMR 的 CLI 命令：

attachment display --operation=/deployment=app.war:read-content(path=META-INF/MANIFEST.MF)

下面是我的操作对象，但是没有办法提供显示/保存附件的命令

ModelNode request = new ModelNode();
request.get(ClientConstants.OP_ADDR).add(ClientConstants.DEPLOYMENT, "app.war");
request.get(ClientConstants.OP).set(ClientConstants.READ_CONTENT_OPERATION);
request.get(ClientConstants.PATH).set("META-INF/MANIFEST.MF");

这个 DMR 操作产生的只是

    "outcome" => "success",
    "result" => "uuid" => "1f45b2bf-8402-4b46-a721-3e3f23db5d80",
    "response-headers" => "attached-streams" => [
        "uuid" => "1f45b2bf-8402-4b46-a721-3e3f23db5d80",
        "mime-type" => "text/plain"
    ]

有没有办法编辑操作或使用操作中返回的 uuid 从流中下载附件？

【参考方案1】：

我也没有看到任何明确的文档。但是，您需要使用OperationResponse 来获取流。这是一个例子。

public class ReadContent 

    public static void main(final String[] args) throws Exception 

        try (ModelControllerClient client = ModelControllerClient.Factory.create("localhost", 9990)) 
            try (
                    StreamEntry entry = readContent(client, "kitchensink.war", "META-INF/MANIFEST.MF");
                    InputStream in = entry.getStream();
            ) 
                int len;
                final byte[] buffer = new byte[256];
                while ((len = in.read(buffer)) != -1) 
                    System.out.write(buffer, 0, len);
                
            
        
    

    private static StreamEntry readContent(final ModelControllerClient client, final String deploymentName, final String path) throws IOException 
        final ModelNode address = Operations.createAddress("deployment", deploymentName);
        final ModelNode op = Operations.createOperation(ClientConstants.READ_CONTENT_OPERATION, address);
        op.get(ClientConstants.PATH).set(path);

        // Execute the operation
        final OperationResponse response = client.executeOperation(Operation.Factory.create(op), OperationMessageHandler.logging);

        // Get the response node to evaluate the outcome
        final ModelNode outcome = response.getResponseNode();
        if (Operations.isSuccessfulOutcome(outcome)) 
            // Read the result and get the UUID the stream is attached to
            final String uuid = Operations.readResult(outcome).get(ClientConstants.UUID).asString();
            return response.getInputStream(uuid);
        

        // The operation has failed, raise and exception with the failure description
        throw new RuntimeException("Failed to read the content: " + Operations.getFailureDescription(outcome).asString());
    

【讨论】：

谢谢你，詹姆斯，这很好用。我已经到了获取 UUID 和 StreamEntry 的地步，但无法将这两者联系在一起。使用 OperationResponse 然后 response.getInputStream(uuid) 是神奇的。非常感谢。