Java

Azure Storage: Lease Container

See more Azure Cloud Storage Examples

Azure Storage Blob Service REST API: Sample code to establishes a lock on a container for delete operations. The lock duration can be 15 to 60 seconds, or can be infinite. Chilkat2 Java

import com.chilkatsoft.chilkat2.AuthAzureStorage;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Crypt2;
import com.chilkatsoft.chilkat2.Rest;

public class ChilkatExample {

    public static void main(String[] args) {
        // Azure Blob Service Example: Lease Container
        // See also: https://msdn.microsoft.com/en-us/library/azure/jj159103.aspx

        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Rest rest = new Rest();

        // Connect to the Azure Storage Blob Service
        boolean bTls = true;
        int port = 443;
        boolean bAutoReconnect = true;
        // In this example, the storage account name is "chilkat".
        try {
            rest.connect("chilkat.blob.core.windows.net", port, bTls, bAutoReconnect);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Provide Azure Cloud credentials for the REST call.
        AuthAzureStorage azAuth = new AuthAzureStorage();
        azAuth.setAccessKey("AZURE_ACCESS_KEY");
        // The account name used here should match the 1st part of the domain passed in the call to Connect (above).
        azAuth.setAccount("chilkat");
        azAuth.setScheme("SharedKey");
        azAuth.setService("Blob");
        // This causes the "x-ms-version: 2021-08-06" header to be automatically added.
        azAuth.setXMsVersion("2021-08-06");
        rest.setAuthAzureStorage(azAuth);

        // Note: The application does not need to explicitly set the following
        // headers: x-ms-date, Authorization.  These headers
        // are automatically set by Chilkat.

        // The lease ID needs to be a GUID.  (UUID and GUID are synonymous)
        Crypt2 crypt = new Crypt2();
        String guid = crypt.generateUuid();
        System.out.println("Lease ID: " + guid);
        rest.addHeader("x-ms-lease-id", guid);

        // The action can be "acquire", "renew", "change", "release", or "break".
        // See https://msdn.microsoft.com/en-us/library/azure/jj159103.aspx
        rest.addHeader("x-ms-lease-action", "acquire");

        // The lease duration..
        rest.addHeader("x-ms-lease-duration", "15");

        // In this example, we are acquiring a lease for the container named "mycontainer".
        String responseStr;
        try {
            responseStr = rest.fullRequestNoBody("PUT", "/mycontainer?restype=container&comp=lease");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // When successful, the Azure Storage service will respond with a 200, 201, or 202 response status code,
        // with no response body.

        // The status code depends on the operation:
        //    Acquire: A successful operation returns status code 201 (Created).
        //    Renew: A successful operation returns status code 200 (OK).
        //    Change: A successful operation returns status code 200 (OK).
        //    Release: A successful operation returns status code 200 (OK).
        //    Break: A successful operation returns status code 202 (Accepted).

        if ((rest.getResponseStatusCode() < 200) || (rest.getResponseStatusCode() > 202)) {
            // Examine the request/response to see what happened.
            System.out.println("response status code = " + rest.getResponseStatusCode());
            System.out.println("response status text = " + rest.getResponseStatusText());
            System.out.println("response header: " + rest.getResponseHeader());
            System.out.println("response body (if any): " + responseStr);
            System.out.println("---");
            System.out.println("LastRequestStartLine: " + rest.getLastRequestStartLine());
            System.out.println("LastRequestHeader: " + rest.getLastRequestHeader());
            return;
        }

        System.out.println("Success: Lease acquired.");
    }
}