Add lease samples for JavaScript

blobs/howto/JavaScript/NodeJS-v12/dev-guide/lease-blob.js

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+// Azure Storage dependency
+const { BlobServiceClient } = require('@azure/storage-blob');
+
+// Azure authentication for credential dependency
+const { DefaultAzureCredential } = require('@azure/identity');
+
+// For development environment - include environment variables from .env
+require("dotenv").config();
+
+// TODO: Replace with your actual storage account name
+const accountName = "<storage-account-name>";
+
+async function main() {
+  // create service client from DefaultAzureCredential
+  const blobServiceClient = new BlobServiceClient(
+    `https://${accountName}.blob.core.windows.net`,
+    new DefaultAzureCredential()
+  );
+
+  const blobClient = blobServiceClient
+    .getContainerClient("sample-container")
+    .getBlobClient("sample-blob.txt");
+
+  // acquire lease
+  const leaseClient = await acquireBlobLeaseAsync(blobClient);
+  // output the blob lease status for testing
+  console.log((await blobClient.getProperties()).leaseState);
+
+  // renew lease
+  await renewBlobLeaseAsync(blobClient, leaseClient.leaseId);
+
+  // release lease
+  await releaseBlobLeaseAsync(blobClient, leaseClient.leaseId);
+  // output the blob lease status for testing
+  console.log((await blobClient.getProperties()).leaseState);
+
+  // break lease
+  //await breakBlobLeaseAsync(blobClient);
+}
+
+// <Snippet_AcquireBlobLease>
+async function acquireBlobLeaseAsync(blobClient) {
+  const leaseClient = blobClient.getBlobLeaseClient();
+  await leaseClient.acquireLease(30);
+  return leaseClient;
+}
+// </Snippet_AcquireBlobLease>
+
+// <Snippet_RenewBlobLease>
+async function renewBlobLeaseAsync(blobClient, leaseID) {
+  const leaseClient = blobClient.getBlobLeaseClient(leaseID);
+  await leaseClient.renewLease();
+}
+// </Snippet_RenewBlobLease>
+
+// <Snippet_ReleaseBlobLease>
+async function releaseBlobLeaseAsync(blobClient, leaseID) {
+  const leaseClient = blobClient.getBlobLeaseClient(leaseID);
+  await leaseClient.releaseLease();
+}
+// </Snippet_ReleaseBlobLease>
+
+// <Snippet_BreakBlobLease>
+async function breakBlobLeaseAsync(blobClient) {
+  const leaseClient = blobClient.getBlobLeaseClient();
+  await leaseClient.breakLease();
+}
+// </Snippet_BreakBlobLease>
+
+main()
+  .then(() => console.log(`done`))
+  .catch((ex) => console.log(ex.message));

blobs/howto/JavaScript/NodeJS-v12/dev-guide/lease-container.js

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+// Azure Storage dependency
+const { BlobServiceClient } = require('@azure/storage-blob');
+
+// Azure authentication for credential dependency
+const { DefaultAzureCredential } = require('@azure/identity');
+
+// For development environment - include environment variables from .env
+require("dotenv").config();
+
+// TODO: Replace with your actual storage account name
+const accountName = "<storage-account-name>";
+
+async function main() {
+  // create service client from DefaultAzureCredential
+  const blobServiceClient = new BlobServiceClient(
+    `https://${accountName}.blob.core.windows.net`,
+    new DefaultAzureCredential()
+  );
+
+  const blobContainerClient = blobServiceClient.getContainerClient("sample-container");
+
+  // acquire lease
+  const leaseClient = await acquireContainerLeaseAsync(blobContainerClient);
+  // output the blob lease status for testing
+  console.log((await blobContainerClient.getProperties()).leaseState);
+
+  // renew lease
+  await renewContainerLeaseAsync(blobContainerClient, leaseClient.leaseId);
+
+  // release lease
+  await releaseContainerLeaseAsync(blobContainerClient, leaseClient.leaseId);
+  // output the blob lease status for testing
+  console.log((await blobContainerClient.getProperties()).leaseState);
+
+  // break lease
+  //await breakContainerLeaseAsync(blobContainerClient);
+}
+
+// <Snippet_AcquireContainerLease>
+async function acquireContainerLeaseAsync(blobContainerClient) {
+  const leaseClient = blobContainerClient.getBlobLeaseClient();
+  await leaseClient.acquireLease(30);
+  return leaseClient;
+}
+// </Snippet_AcquireContainerLease>
+
+// <Snippet_RenewContainerLease>
+async function renewContainerLeaseAsync(blobContainerClient, leaseID) {
+  const leaseClient = blobContainerClient.getBlobLeaseClient(leaseID);
+  await leaseClient.renewLease();
+}
+// </Snippet_RenewContainerLease>
+
+// <Snippet_ReleaseContainerLease>
+async function releaseContainerLeaseAsync(blobContainerClient, leaseID) {
+  const leaseClient = blobContainerClient.getBlobLeaseClient(leaseID);
+  await leaseClient.releaseLease();
+}
+// </Snippet_ReleaseContainerLease>
+
+// <Snippet_BreakContainerLease>
+async function breakContainerLeaseAsync(blobContainerClient) {
+  const leaseClient = blobContainerClient.getBlobLeaseClient();
+  await leaseClient.breakLease();
+}
+// </Snippet_BreakContainerLease>
+
+main()
+  .then(() => console.log(`done`))
+  .catch((ex) => console.log(ex.message));