java - 使用版本将文件保存在露天并下载最新版本

Question

我使用 alfresco Community 4.0，并且使用了这个 jar alfresco-web-service-client-4.0.d.jar

使用此代码我可以在露天保存我的 test.pdf 文件:

File file = new File("C:/test.pdf");

  saveAttachement(file,"test.pdf", "/app:company_home/cm:MyFolder",
                        "admin", "admin")



                         public String saveAttachement(File file, String name, String folderName, String userName, String pwd)
        throws Exception {


        byte[] contentByte = IOUtils.toByteArray(new FileInputStream(file));

        // Start the session
        AuthenticationUtils.startSession(userName, pwd);

        try {
            // Create a reference to the parent where we want to create content
            Store storeRef = new Store(Constants.WORKSPACE_STORE, "SpacesStore");
            ParentReference companyHomeParent = new ParentReference(storeRef, null, folderName, Constants.ASSOC_CONTAINS, null);

            // Assign name
            companyHomeParent.setChildName("cm:" + name);

            // Construct CML statement to create content node
            // Note: Assign "1" as a local id, so we can refer to it in subsequent
            //       CML statements within the same CML block
            NamedValue[] contentProps = new NamedValue[1];
            contentProps[0] = Utils.createNamedValue(Constants.PROP_NAME, name);

            CMLCreate create = new CMLCreate("1", companyHomeParent, null, null, null, Constants.TYPE_CONTENT, contentProps);

            // Construct CML statement to add titled aspect
            NamedValue[] titledProps = new NamedValue[2];
            titledProps[0] = Utils.createNamedValue(Constants.PROP_TITLE, name);
            titledProps[1] = Utils.createNamedValue(Constants.PROP_DESCRIPTION, name);

            CMLAddAspect addAspect = new CMLAddAspect(Constants.ASPECT_TITLED, titledProps, null, "1");

            // Construct CML Block
            CML cml = new CML();
            cml.setCreate(new CMLCreate[] { create });
            cml.setAddAspect(new CMLAddAspect[] { addAspect });

            // Issue CML statement via Repository Web Service and retrieve result
            // Note: Batching of multiple statements into a single web call
            UpdateResult[] result = WebServiceFactory.getRepositoryService().update(cml);
            Reference content = result[0].getDestination();

            // Write some content
            ContentServiceSoapBindingStub contentService = WebServiceFactory.getContentService();

            //String text = "The quick brown fox jumps over the lazy dog";
            ContentFormat contentFormat = new ContentFormat("text/plain", "UTF-8");
            Content contentRef = contentService.write(content, Constants.PROP_CONTENT, contentByte, contentFormat);
            System.out.println("Document are created successfully. UID:= " + content.getUuid());

            return content.getUuid();
        } catch (Throwable e) {
            System.out.println(e.toString());
        } finally {
            // End the session
            AuthenticationUtils.endSession();

            //System.exit(0);
        }

        return null;
    }

在露天保存此文件后，我有这个 ID d7633eff-8595-4d6c-8c18-a29a656607ba

稍后将使用它来下载此文件

这是下载代码:

ContentResult contentResult = getContentsById("d7633eff-8595-4d6c-8c18-a29a656607ba", "admin", "admin");


       public ContentResult getContentsById(String contentId, String userName, String pwd)
        throws Exception {
        ContentResult contentResult = new ContentResult();

        // Start the session
        AuthenticationUtils.startSession(userName, pwd);

        try {
            Store storeRef = new Store(Constants.WORKSPACE_STORE, "SpacesStore");
            ContentServiceSoapBindingStub contentService = WebServiceFactory.getContentService();

            Reference contentReference = new Reference(storeRef, contentId, null);
            Content[] readResult = null;

            try {
                readResult = contentService.read(new Predicate(new Reference[] { contentReference }, storeRef, null), Constants.PROP_CONTENT);
            } catch (ContentFault e) {
                e.printStackTrace();
            } catch (RemoteException e) {
                e.printStackTrace();
            }

            if ((readResult != null) && (readResult[0] != null)) {
                Content content = readResult[0];
                ContentFormat cnf = content.getFormat();
                Reference ref = content.getNode();

                String[] splitedUrl = content.getUrl().split("/");
                String name = splitedUrl[splitedUrl.length - 1];

                InputStream is = ContentUtils.getContentAsInputStream(content);
                byte[] contentByte = ConvertUtil.convertInputStreamToByte(is);

                contentResult.setName(name);
                contentResult.setMimetype(cnf.getMimetype());
                contentResult.setId(ref.getUuid());
                contentResult.setUrl(content.getUrl());
                contentResult.setPath(ref.getPath());
                contentResult.setContentByte(contentByte);
                System.out.println(" document has been retrieved");
            }
        } catch (Exception e) {
            System.out.println(e.toString());
        } finally {
            // End the session
            AuthenticationUtils.endSession();

            // System.exit(0);
        }

        return contentResult;
    }

目前我更改了test.pdf文件内容而不更改文件名 我把它放在光盘的另一个位置。

这是新的文件位置。

C:/version/test.pdf

所以在磁盘中我有两个同名但内容不同的文件。

我的目标是在露天保存新文件，但使用版本控制。

在我看来，我必须使用保存在露天的旧ID:d7633eff-8595-4d6c-8c18-a29a656607ba

所以我应该开发一种方法，将新文件和旧 id 作为参数

像这样

 File file = new File("C:/version/test.pdf");

  saveWithVersionAttachement(file,"d7633eff-8595-4d6c-8c18-a29a656607ba","test.pdf", "/app:company_home/cm:MyFolder",
                        "admin", "admin",)



                         public String saveWithVersionAttachement(File file,String oldId, String name, String folderName, String userName, String pwd)
        throws Exception {
 .............
 .............

在我看来，这种方法必须将新文件保存在露天，如 test_2.pdf 或 test_v2.pdf ..

因此这两个文件保存在 alfresco 中并且具有相同的 id

并且在下载方法中我想要最新版本。

所以我必须更改方法getContentById ("d7633eff-8595-4d6c-8c18-a29a656607ba", "admin", "admin");

为了返回最新版本，即test_2.pdf或test_v2.pdf ...

我尝试使用 alfresco-OpenCMIS-extension-0.7.jar 来使用 OpenCMIS，但没有成功

我在 Alfresco\tomcat\webapps\alfresco\WEB-INF\classes\alfresco\model\contentModel.xml 中添加了此行

<mandatory-aspects>
<aspect>cm:versionable</aspect>
</mandatory-aspects>

我还添加了这一行version.store.enableAutoVersioning=true

在Alfresco\tomcat\shared\classes\alfresco-global.properties

有没有人可以帮我解决我的问题

更新:

我与 CMIS 合作:

我尝试使用这段代码:

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.chemistry.opencmis.client.api.Document;
import org.apache.chemistry.opencmis.client.api.Repository;
import org.apache.chemistry.opencmis.client.api.Session;
import org.apache.chemistry.opencmis.client.api.SessionFactory;
import org.apache.chemistry.opencmis.client.runtime.SessionFactoryImpl;
import org.apache.chemistry.opencmis.commons.SessionParameter;
import org.apache.chemistry.opencmis.commons.data.ContentStream;
import org.apache.chemistry.opencmis.commons.enums.BindingType;
import org.apache.commons.io.IOUtils;


     public void saveVersioning(File file, String filename, String userName, String pwd, String docId)
            throws Exception {

            SessionFactory factory = SessionFactoryImpl.newInstance();
            Map<String, String> parameters = new HashMap<String, String>();

            // User credentials.
            parameters.put(SessionParameter.USER,userName);
            parameters.put(SessionParameter.PASSWORD, pwd);

            // Connection settings.
            parameters.put(SessionParameter.BINDING_TYPE, BindingType.ATOMPUB.value());
            parameters.put(SessionParameter.ATOMPUB_URL, "http://localhost:9080/alfresco/service/cmis"); // URL to your CMIS server.
            parameters.put(SessionParameter.AUTH_HTTP_BASIC, "true" );

            // Create session.
            // Alfresco only provides one repository.
            Repository repository = factory.getRepositories(parameters).get(0);

            Session session = repository.createSession();

             // Get the contents of the file
            Document doc = (Document) session.getObject(docId);
            ContentStream contentStream = doc.getContentStream(); // returns null if the document has no content
            if (contentStream != null) {


                    String mimetype = "text/plain; charset=UTF-8";
                    String content = "";

                    if (contentStream != null) {
                        filename = contentStream.getFileName();
                        mimetype = contentStream.getMimeType();
                        content = getContentAsString(contentStream);
                        System.out.println("file name "+filename);
                        System.out.println("minetype "+mimetype);
                        System.out.println("content "+content);
                    }


                    byte[] buf = IOUtils.toByteArray(new FileInputStream(file));
                    ByteArrayInputStream input = new ByteArrayInputStream(buf);

                    contentStream = session.getObjectFactory().createContentStream(
                            filename, buf.length, mimetype, input);



                    System.out.println("Document version history");
                    {
                        List<Document> versions = doc.getAllVersions();
                        for (Document version : versions) {
                            System.out.println("\tname: " + version.getName());
                            System.out.println("\tversion label: " + version.getVersionLabel());
                            System.out.println("\tversion series id: " + version.getVersionSeriesId());
                            System.out.println("\tchecked out by: "
                                    + version.getVersionSeriesCheckedOutBy());
                            System.out.println("\tchecked out id: "
                                    + version.getVersionSeriesCheckedOutId());
                            System.out.println("\tmajor version: " + version.isMajorVersion());
                            System.out.println("\tlatest version: " + version.isLatestVersion());
                            System.out.println("\tlatest major version: " + version.isLatestMajorVersion());
                            System.out.println("\tcheckin comment: " + version.getCheckinComment());
                            System.out.println("\tcontent length: " + version.getContentStreamLength()
                                    + "\n");
                        }
                    }
                }



        }



    private static String getContentAsString(ContentStream stream) throws IOException {
        StringBuilder sb = new StringBuilder();
        Reader reader = new InputStreamReader(stream.getStream(), "UTF-8");

        try {
            final char[] buffer = new char[4 * 1024];
            int b;
            while (true) {
                b = reader.read(buffer, 0, buffer.length);
                if (b > 0) {
                    sb.append(buffer, 0, b);
                } else if (b == -1) {
                    break;
                }
            }
        } finally {
            reader.close();
        }

        return sb.toString();
    }

我使用以下代码调用此函数:

File file = new File("C:/version/test.pdf");

saveVersioning(file, "test.pdf","admin","admin","d7633eff-8595-4d6c-8c18-a29a656607ba");

我用过这个 jar :

chemistry-opencmis-client-api-0.13.0.jar
chemistry-opencmis-client-bindings-0.13.0.jar
chemistry-opencmis-client-impl-0.13.0.jar
chemistry-opencmis-commons-api-0.13.0.jar
chemistry-opencmis-commons-impl-0.13.0.jar
commons-io-1.4.jar
slf4j-api-1.7.5.jar
stax2-api-3.1.4.jar
woodstox-core-asl-4.4.0.jar

但是当我尝试测试时出现此错误:

Caused by: java.lang.NoClassDefFoundError: org/apache/chemistry/opencmis/client/api/SessionFactory
.............
............
Caused by: java.lang.ClassNotFoundException: org.apache.chemistry.opencmis.client.api.SessionFactory
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
    ... 124 more

Answer 1

实现这一目标的最快且最简单的方法是利用 RESTfull API

这也将确保与新版本的 alfresco 的兼容性。

请注意，您需要在表单属性 updatenoderef 中提供要更新的文档的节点引用，并且属性 majorversion 是一个 boolean 标志，用于指定是否是新版本是文档的次要/主要版本。

以下示例代码可能会对您的用例有所帮助:

        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpPost uploadFile = new HttpPost(<alfresco-service-uri>+"/api/upload?alf_ticket="+<al-ticket>);

        MultipartEntityBuilder builder = MultipartEntityBuilder.create();
        builder.addTextBody("username", "<username>", ContentType.TEXT_PLAIN);
        builder.addTextBody("updatenoderef", <noderef>, ContentType.TEXT_PLAIN);
        builder.addTextBody("...", "...", ContentType.TEXT_PLAIN);
        builder.addBinaryBody("filedata", <InputStream>, ContentType.DEFAULT_BINARY, <filename>);
        HttpEntity multipart = builder.build();

        uploadFile.setEntity(multipart);

        CloseableHttpResponse response = httpClient.execute(uploadFile);

        String responseString = IOUtils.toString(response.getEntity().getContent(), "UTF-8"); 
        JSONObject responseJson = new JSONObject(responseString);
        if (response.getStatusLine().getStatusCode()!=200){
            throw new Exception("Couldn't upload file to the repository, webscript response :" + responseString );
        }

注1:您需要将这些标记<*>替换为您自己的值/变量

注意 2:如果您在检索票证时遇到问题，请检查 this link ，或this one