Question

我希望能够使用Parse4J库（https://github.com/thiagolocatelli/parse4j/）连接到托管的Parse-Server。我想使用https://parseapi.back4app.com作为API端点。它们提供了坚实的Parse托管解决方案。

代码：

import org.parse4j.Parse;
import org.parse4j.ParseException;
import org.parse4j.ParseObject;
import org.parse4j.ParseQuery;
import org.parse4j.callback.GetCallback;

/**
 * Created by Martin on 3/27/2017.
 */
public class Parse4JStarter {

    public static void main(String[] args) {

        Parse.initialize("applicationId","restAPIKey");

        if (Parse.getApplicationId() != null) {
            System.out.println("ParseConnection successful! " + Parse.getApplicationId());

            try {
                queryPost();
            } catch (ParseException e) {
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    private static void queryPost() throws Exception {
        ParseQuery<ParseObject> query = ParseQuery.getQuery("Post");
        query.getInBackground("4tD9TIIIhv", new GetCallback<ParseObject>() {
            public void done(ParseObject object, ParseException e) {
                if (e == null) {
                    System.out.println("ParseObject printed successfully! " + object);
                } else {
                    e.printStackTrace();
                }
            }
        });
    }
}

依赖关系：

<dependencies>
        <dependency>
            <groupId>com.github.thiagolocatelli</groupId>
            <artifactId>parse4j</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.5</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.6.4</version>
        </dependency>
    </dependencies>

我尝试通过提供本地版本来覆盖Maven存储库，即1.4-FIXED并将ParseConstants.java中的API_ENDPOINT值更改为指向https://parseapi.back4app.com，这是我的数据库所在的位置：

public class ParseConstants {

    public static final String API_ENDPOINT = "https://parseapi.back4app.com";
    public static final String API_VERSION = "1";

    public static final String HEADER_CONTENT_TYPE = "Content-Type";
    public static final String HEADER_APPLICATION_ID = "X-Parse-Application-Id";
    public static final String HEADER_REST_API_KEY = "X-Parse-REST-API-Key";
    public static final String HEADER_MASTER_KEY = "X-Parse-Master-Key";
    public static final String HEADER_SESSION_TOKEN = "X-Parse-Session-Token";

    public static final String CONTENT_TYPE_JSON = "application/json";

    public static final String FIELD_OBJECT_ID = "objectId";
    public static final String FIELD_CREATED_AT = "createdAt";
    public static final String FIELD_UPDATED_AT = "updatedAt";
    public static final String FIELD_SESSION_TOKEN = "sessionToken";


    public static int MAX_PARSE_FILE_SIZE = 10485760;

}

我收到了ParseException：

ParseException [code=109, error=unauthorized]
    at org.parse4j.command.ParseResponse.getParseError(ParseResponse.java:122)
    at org.parse4j.command.ParseResponse.getException(ParseResponse.java:78)
    at org.parse4j.ParseQuery.find(ParseQuery.java:598)
    at org.parse4j.ParseQuery.find(ParseQuery.java:469)
    at org.parse4j.ParseQuery.get(ParseQuery.java:377)
    at org.parse4j.ParseQuery$GetInBackgroundThread.run(ParseQuery.java:452)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

这意味着我的连接未正确初始化：

   /**
   * You must call Parse.initialize before using the Parse library.
   */
  public static final int NOT_INITIALIZED = 109;

通过更彻底地调查Parse4J库，我可以做更多的事情。然而，在这一点上，我迷失了。我该怎么办？

Answer 1

感谢Parse4J的开发人员，我能够通过将我的依赖关系更新到最新的快照版本1.5-SNAPSHOT来解决我的问题，然后更新我的初始化方法以包含保存自定义API端点的第三个参数。这可能是在8个月前发生的，但是文档没有提到使用最新版本的任何内容，因为它尚未正式发布。我使用https://parseapi.back4app.com进行了此操作。它们提供了一个可靠的Parse托管解决方案，但您可以用自己的URI替换它。新的版本应该在我认为的角落......

<dependencies>
        <dependency>
            <groupId>com.github.thiagolocatelli</groupId>
            <artifactId>parse4j</artifactId>
            <version>1.5-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.5</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.6.4</version>
        </dependency>
    </dependencies>

初始化方法：

Parse.initialize(applicationId, restAPIKey, "https://parseapi.back4app.com");

请参阅此处的文档：https://github.com/thiagolocatelli/parse4j/commit/4113b422631c364488bc51152da8b071542e8159

如何通过Parse4J连接到托管的Parse-Server？

1 个答案: