**此頁面僅適用於使用 Vaults 和 2012 年原始 REST API 的 Amazon Glacier 服務的現有客戶。**
如果您要尋找封存儲存解決方案，建議您在 Amazon Glacier Instant Retrieval、S3 Glacier Flexible Retrieval 和 S3 Glacier Deep Archive 中使用 Amazon Glacier 儲存類別。 Amazon S3 若要進一步了解這些儲存選項，請參閱 [Amazon Glacier 儲存類別](https://aws.amazon.com/s3/storage-classes/glacier/)。
Amazon Glacier （原始獨立保存庫型服務） 不再接受新客戶。Amazon Glacier 是一項獨立服務，具有自己的 APIs，可將資料存放在保存庫中，並與 Amazon S3 和 Amazon S3 Glacier 儲存類別不同。您現有的資料將在 Amazon Glacier 中無限期保持安全且可存取。不需要遷移。對於低成本、長期的封存儲存， AWS 建議使用 [Amazon S3 Glacier 儲存類別](https://aws.amazon.com/s3/storage-classes/glacier/)，透過 S3 儲存貯體型 APIs、完整 AWS 區域 可用性、降低成本 AWS 和服務整合，提供卓越的客戶體驗。如果您想要增強功能，請考慮使用我們的解決方案指南，將資料從 Amazon S3 Glacier 保存庫傳輸至 Amazon S3 Glacier 儲存類別，以遷移至 Amazon S3 Glacier 儲存類別。 [AWS Amazon Glacier Amazon S3 ](https://aws.amazon.com/solutions/guidance/data-transfer-from-amazon-s3-glacier-vaults-to-amazon-s3/)
本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。
# 使用 在 Amazon Glacier 中下載封存 適用於 Java 的 AWS SDK
適用於 Java 的 Amazon 開發套件提供的[高階和低階 API](using-aws-sdk.md) 都提供了下載封存的方法。
**Topics**
+ [使用 的高階 API 下載封存 適用於 Java 的 AWS SDK](#downloading-an-archive-using-java-highlevel-api)
+ [使用 的低階 API 下載封存 適用於 Java 的 AWS SDK](#downloading-an-archive-using-java-lowlevel-api)
## 使用 的高階 API 下載封存 適用於 Java 的 AWS SDK
高階 API 的 `ArchiveTransferManager` 類別提供可用來下載封存的 `download` 方法。
**重要**
此 `ArchiveTransferManager` 類別會建立 Amazon Simple Notification Service (Amazon SNS) 主題，以及訂閱該主題的 Amazon Simple Queue Service (Amazon SQS) 佇列。然後啟動封存擷取任務並輪詢佇列以使封存可用。封存可用時，就會開始下載。如需封存擷取時間的詳細資訊，請參閱 [封存擷取選項](downloading-an-archive-two-steps.md#api-downloading-an-archive-two-steps-retrieval-options)。
### 範例：使用 的高階 API 下載封存 適用於 Java 的 AWS SDK
以下 Java 程式碼範例從美國西部 (奧勒岡) 區域 (`us-west-2`) 中的保存庫 (`examplevault`) 下載封存。
如需執行此範例的逐步說明，請參閱 [使用 Eclipse 執行 Amazon Glacier 的 Java 範例](using-aws-sdk-for-java.md#setting-up-and-testing-sdk-java)。您需要更新程式碼，如所示之在現有的封存 ID 以及欲儲存下載封存的本機檔案路徑 。
**Example**
```
import java.io.File;
import java.io.IOException;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.services.glacier.AmazonGlacierClient;
import com.amazonaws.services.glacier.transfer.ArchiveTransferManager;
import com.amazonaws.services.sns.AmazonSNSClient;
import com.amazonaws.services.sqs.AmazonSQSClient;
public class ArchiveDownloadHighLevel {
public static String vaultName = "examplevault";
public static String archiveId = "*** provide archive ID ***";
public static String downloadFilePath = "*** provide location to download archive ***";
public static AmazonGlacierClient glacierClient;
public static AmazonSQSClient sqsClient;
public static AmazonSNSClient snsClient;
public static void main(String[] args) throws IOException {
ProfileCredentialsProvider credentials = new ProfileCredentialsProvider();
glacierClient = new AmazonGlacierClient(credentials);
sqsClient = new AmazonSQSClient(credentials);
snsClient = new AmazonSNSClient(credentials);
glacierClient.setEndpoint("glacier.us-west-2.amazonaws.com");
sqsClient.setEndpoint("sqs.us-west-2.amazonaws.com");
snsClient.setEndpoint("sns.us-west-2.amazonaws.com");
try {
ArchiveTransferManager atm = new ArchiveTransferManager(glacierClient, sqsClient, snsClient);
atm.download(vaultName, archiveId, new File(downloadFilePath));
System.out.println("Downloaded file to " + downloadFilePath);
} catch (Exception e)
{
System.err.println(e);
}
}
}
```
## 使用 的低階 API 下載封存 適用於 Java 的 AWS SDK
以下是使用 適用於 Java 的 AWS SDK 低階 API 來擷取保存庫庫存的步驟。
1. 建立 `AmazonGlacierClient` 類別的執行個體 (用戶端)。
您需要指定要 AWS 從中下載封存的區域。您使用此用戶端執行的所有操作都會套用到該 AWS 區域。
1. 執行 `archive-retrieval` 方法以啟動 `initiateJob` 任務。
您可以透過建立 `InitiateJobRequest`類別的執行個體，提供任務資訊，例如您要下載之封存的封存 ID，以及您希望 Amazon Glacier (Amazon Glacier) 發佈任務完成訊息的選用 Amazon SNS 主題。Amazon Glacier 傳回任務 ID 以回應。該回應在 `InitiateJobResult` 類別的執行個體中可用。
```
JobParameters jobParameters = new JobParameters()
.withArchiveId("*** provide an archive id ***")
.withDescription("archive retrieval")
.withRetrievalByteRange("*** provide a retrieval range***") // optional
.withType("archive-retrieval");
InitiateJobResult initiateJobResult = client.initiateJob(new InitiateJobRequest()
.withJobParameters(jobParameters)
.withVaultName(vaultName));
String jobId = initiateJobResult.getJobId();
```
您可以選擇性地指定位元組範圍，以請求 Amazon Glacier 僅準備封存的一部分。例如，您可以透過新增以下陳述式來請求 Amazon Glacier 僅準備封存的 1 MB 到 2 MB 部分，從而更新上述請求。
```
int ONE_MEG = 1048576;
String retrievalByteRange = String.format("%s-%s", ONE_MEG, 2*ONE_MEG -1);
JobParameters jobParameters = new JobParameters()
.withType("archive-retrieval")
.withArchiveId(archiveId)
.withRetrievalByteRange(retrievalByteRange)
.withSNSTopic(snsTopicARN);
InitiateJobResult initiateJobResult = client.initiateJob(new InitiateJobRequest()
.withJobParameters(jobParameters)
.withVaultName(vaultName));
String jobId = initiateJobResult.getJobId();
```
1. 等候 工作完成。
您必須等到任務輸出準備好供您下載。如果您已在保存庫上設定通知組態來識別 Amazon Simple Notification Service (Amazon SNS) 主題，或在啟動任務時指定 Amazon SNS 主題，Amazon Glacier 會在完成任務後傳送訊息至該主題。
您也可以呼叫 `describeJob`方法來輪詢 Amazon Glacier，以判斷任務完成狀態。雖然，使用 Amazon SNS 主題進行通知是建議的方法。
1. 透過執行 `getJobOutput` 方法下載任務輸出 (封存資料)。
透過建立 `GetJobOutputRequest` 類別的執行個體來提供請求資訊，如工作 ID 和保存庫名稱。Amazon Glacier 傳回的輸出可在 `GetJobOutputResult` 物件中使用。
```
GetJobOutputRequest jobOutputRequest = new GetJobOutputRequest()
.withJobId("*** provide a job ID ***")
.withVaultName("*** provide a vault name ****");
GetJobOutputResult jobOutputResult = client.getJobOutput(jobOutputRequest);
// jobOutputResult.getBody() // Provides the input stream.
```
上述程式碼片段下載整個任務的輸出。您可以選擇只擷取輸出的一部分，或透過指定 `GetJobOutputRequest` 中的位元組範圍以較小的區塊下載整個輸出。
```
GetJobOutputRequest jobOutputRequest = new GetJobOutputRequest()
.withJobId("*** provide a job ID ***")
.withRange("bytes=0-1048575") // Download only the first 1 MB of the output.
.withVaultName("*** provide a vault name ****");
```
為了回應您的`GetJobOutput`呼叫，如果符合特定條件，Amazon Glacier 會傳回您下載之資料部分的檢查總和。如需詳細資訊，請參閱[下載資料時接收檢查總和](checksum-calculations-range.md)。
若要確認下載中沒有錯誤，您可以計算用戶端的檢查總和，並將其與回應中Amazon Glacier傳送的檢查總和進行比較。
對於指定可選範圍的封存擷取任務，當您取得任務說明時，它將包含您正在擷取的範圍的檢查總和 (SHA256TreeHash)。您可以使用此值進一步驗證稍後下載的整個位元組範圍的準確性。例如，如果啟動任務以擷取樹狀雜湊符合的封存範圍，然後以區塊的方式下載輸出，以便每個 `GetJobOutput` 請求傳回檢查總和，則可以計算在用戶端上下載的每個部分的檢查總和，然後計算樹狀雜湊。您可以將其與 Amazon Glacier 傳回的檢查總和進行比較，以回應您的描述任務請求，以確認您下載的整個位元組範圍與存放在 Amazon Glacier 中的位元組範圍相同。
如需運作範例，請參閱 [範例 2：使用 的低階 API 擷取封存 適用於 Java 的 AWS SDK- 在區塊中下載輸出](#downloading-an-archive-with-range-using-java-example)。
### 範例 1：使用 的低階 API 擷取封存 適用於 Java 的 AWS SDK
以下 Java 程式碼範例從指定的保存庫下載封存。任務完成後，該範例將在單一 `getJobOutput` 呼叫中下載整個輸出。如需有關以區塊形式下載輸出的範例，請參閱 [範例 2：使用 的低階 API 擷取封存 適用於 Java 的 AWS SDK- 在區塊中下載輸出](#downloading-an-archive-with-range-using-java-example)。
範例會執行下列任務：
+ 建立 Amazon Simple Notification Service (Amazon SNS) 主題。
Amazon Glacier 會在完成任務後傳送通知至此主題。
+ 建立 Amazon Simple Queue Service (Amazon SQS) 佇列。
此範例將政策連接至佇列，以使 Amazon SNS 主題能夠發佈訊息到佇列。
+ 起始任務以下載指定的封存。
在任務請求中，指定已建立的 Amazon SNS 主題，以便 Amazon Glacier 在完成任務後可以將通知發佈至主題。
+ 定期檢查 Amazon SQS 佇列中是否有包含工作 ID 的訊息。
如果有訊息，剖析 JSON 並檢查任務是否順利完成。如果是，請下載封存。
+ 透過刪除 Amazon SNS 主題和其建立的 Amazon SQS 佇列來清除。
```
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.JsonParseException;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.map.ObjectMapper;
import com.amazonaws.AmazonClientException;
import com.amazonaws.auth.policy.Policy;
import com.amazonaws.auth.policy.Principal;
import com.amazonaws.auth.policy.Resource;
import com.amazonaws.auth.policy.Statement;
import com.amazonaws.auth.policy.Statement.Effect;
import com.amazonaws.auth.policy.actions.SQSActions;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.services.glacier.AmazonGlacierClient;
import com.amazonaws.services.glacier.model.GetJobOutputRequest;
import com.amazonaws.services.glacier.model.GetJobOutputResult;
import com.amazonaws.services.glacier.model.InitiateJobRequest;
import com.amazonaws.services.glacier.model.InitiateJobResult;
import com.amazonaws.services.glacier.model.JobParameters;
import com.amazonaws.services.sns.AmazonSNSClient;
import com.amazonaws.services.sns.model.CreateTopicRequest;
import com.amazonaws.services.sns.model.CreateTopicResult;
import com.amazonaws.services.sns.model.DeleteTopicRequest;
import com.amazonaws.services.sns.model.SubscribeRequest;
import com.amazonaws.services.sns.model.SubscribeResult;
import com.amazonaws.services.sns.model.UnsubscribeRequest;
import com.amazonaws.services.sqs.AmazonSQSClient;
import com.amazonaws.services.sqs.model.CreateQueueRequest;
import com.amazonaws.services.sqs.model.CreateQueueResult;
import com.amazonaws.services.sqs.model.DeleteQueueRequest;
import com.amazonaws.services.sqs.model.GetQueueAttributesRequest;
import com.amazonaws.services.sqs.model.GetQueueAttributesResult;
import com.amazonaws.services.sqs.model.Message;
import com.amazonaws.services.sqs.model.ReceiveMessageRequest;
import com.amazonaws.services.sqs.model.SetQueueAttributesRequest;
public class AmazonGlacierDownloadArchiveWithSQSPolling {
public static String archiveId = "*** provide archive ID ****";
public static String vaultName = "*** provide vault name ***";
public static String snsTopicName = "*** provide topic name ***";
public static String sqsQueueName = "*** provide queue name ***";
public static String sqsQueueARN;
public static String sqsQueueURL;
public static String snsTopicARN;
public static String snsSubscriptionARN;
public static String fileName = "*** provide file name ***";
public static String region = "*** region ***";
public static long sleepTime = 600;
public static AmazonGlacierClient client;
public static AmazonSQSClient sqsClient;
public static AmazonSNSClient snsClient;
public static void main(String[] args) throws IOException {
ProfileCredentialsProvider credentials = new ProfileCredentialsProvider();
client = new AmazonGlacierClient(credentials);
client.setEndpoint("https://glacier." + region + ".amazonaws.com");
sqsClient = new AmazonSQSClient(credentials);
sqsClient.setEndpoint("https://sqs." + region + ".amazonaws.com");
snsClient = new AmazonSNSClient(credentials);
snsClient.setEndpoint("https://sns." + region + ".amazonaws.com");
try {
setupSQS();
setupSNS();
String jobId = initiateJobRequest();
System.out.println("Jobid = " + jobId);
Boolean success = waitForJobToComplete(jobId, sqsQueueURL);
if (!success) { throw new Exception("Job did not complete successfully."); }
downloadJobOutput(jobId);
cleanUp();
} catch (Exception e) {
System.err.println("Archive retrieval failed.");
System.err.println(e);
}
}
private static void setupSQS() {
CreateQueueRequest request = new CreateQueueRequest()
.withQueueName(sqsQueueName);
CreateQueueResult result = sqsClient.createQueue(request);
sqsQueueURL = result.getQueueUrl();
GetQueueAttributesRequest qRequest = new GetQueueAttributesRequest()
.withQueueUrl(sqsQueueURL)
.withAttributeNames("QueueArn");
GetQueueAttributesResult qResult = sqsClient.getQueueAttributes(qRequest);
sqsQueueARN = qResult.getAttributes().get("QueueArn");
Policy sqsPolicy =
new Policy().withStatements(
new Statement(Effect.Allow)
.withPrincipals(Principal.AllUsers)
.withActions(SQSActions.SendMessage)
.withResources(new Resource(sqsQueueARN)));
Map queueAttributes = new HashMap();
queueAttributes.put("Policy", sqsPolicy.toJson());
sqsClient.setQueueAttributes(new SetQueueAttributesRequest(sqsQueueURL, queueAttributes));
}
private static void setupSNS() {
CreateTopicRequest request = new CreateTopicRequest()
.withName(snsTopicName);
CreateTopicResult result = snsClient.createTopic(request);
snsTopicARN = result.getTopicArn();
SubscribeRequest request2 = new SubscribeRequest()
.withTopicArn(snsTopicARN)
.withEndpoint(sqsQueueARN)
.withProtocol("sqs");
SubscribeResult result2 = snsClient.subscribe(request2);
snsSubscriptionARN = result2.getSubscriptionArn();
}
private static String initiateJobRequest() {
JobParameters jobParameters = new JobParameters()
.withType("archive-retrieval")
.withArchiveId(archiveId)
.withSNSTopic(snsTopicARN);
InitiateJobRequest request = new InitiateJobRequest()
.withVaultName(vaultName)
.withJobParameters(jobParameters);
InitiateJobResult response = client.initiateJob(request);
return response.getJobId();
}
private static Boolean waitForJobToComplete(String jobId, String sqsQueueUrl) throws InterruptedException, JsonParseException, IOException {
Boolean messageFound = false;
Boolean jobSuccessful = false;
ObjectMapper mapper = new ObjectMapper();
JsonFactory factory = mapper.getJsonFactory();
while (!messageFound) {
List msgs = sqsClient.receiveMessage(
new ReceiveMessageRequest(sqsQueueUrl).withMaxNumberOfMessages(10)).getMessages();
if (msgs.size() > 0) {
for (Message m : msgs) {
JsonParser jpMessage = factory.createJsonParser(m.getBody());
JsonNode jobMessageNode = mapper.readTree(jpMessage);
String jobMessage = jobMessageNode.get("Message").getTextValue();
JsonParser jpDesc = factory.createJsonParser(jobMessage);
JsonNode jobDescNode = mapper.readTree(jpDesc);
String retrievedJobId = jobDescNode.get("JobId").getTextValue();
String statusCode = jobDescNode.get("StatusCode").getTextValue();
if (retrievedJobId.equals(jobId)) {
messageFound = true;
if (statusCode.equals("Succeeded")) {
jobSuccessful = true;
}
}
}
} else {
Thread.sleep(sleepTime * 1000);
}
}
return (messageFound && jobSuccessful);
}
private static void downloadJobOutput(String jobId) throws IOException {
GetJobOutputRequest getJobOutputRequest = new GetJobOutputRequest()
.withVaultName(vaultName)
.withJobId(jobId);
GetJobOutputResult getJobOutputResult = client.getJobOutput(getJobOutputRequest);
InputStream input = new BufferedInputStream(getJobOutputResult.getBody());
OutputStream output = null;
try {
output = new BufferedOutputStream(new FileOutputStream(fileName));
byte[] buffer = new byte[1024 * 1024];
int bytesRead = 0;
do {
bytesRead = input.read(buffer);
if (bytesRead <= 0) break;
output.write(buffer, 0, bytesRead);
} while (bytesRead > 0);
} catch (IOException e) {
throw new AmazonClientException("Unable to save archive", e);
} finally {
try {input.close();} catch (Exception e) {}
try {output.close();} catch (Exception e) {}
}
System.out.println("Retrieved archive to " + fileName);
}
private static void cleanUp() {
snsClient.unsubscribe(new UnsubscribeRequest(snsSubscriptionARN));
snsClient.deleteTopic(new DeleteTopicRequest(snsTopicARN));
sqsClient.deleteQueue(new DeleteQueueRequest(sqsQueueURL));
}
}
```
### 範例 2：使用 的低階 API 擷取封存 適用於 Java 的 AWS SDK- 在區塊中下載輸出
下列 Java 程式碼範例會從 Amazon Glacier 擷取封存。該程式碼範例透過在 `GetJobOutputRequest` 物件中指定位元組範圍來下載區塊中的任務輸出。
```
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.amazonaws.auth.policy.Policy;
import com.amazonaws.auth.policy.Principal;
import com.amazonaws.auth.policy.Resource;
import com.amazonaws.auth.policy.Statement;
import com.amazonaws.auth.policy.Statement.Effect;
import com.amazonaws.auth.policy.actions.SQSActions;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.services.glacier.AmazonGlacierClient;
import com.amazonaws.services.glacier.TreeHashGenerator;
import com.amazonaws.services.glacier.model.GetJobOutputRequest;
import com.amazonaws.services.glacier.model.GetJobOutputResult;
import com.amazonaws.services.glacier.model.InitiateJobRequest;
import com.amazonaws.services.glacier.model.InitiateJobResult;
import com.amazonaws.services.glacier.model.JobParameters;
import com.amazonaws.services.sns.AmazonSNSClient;
import com.amazonaws.services.sns.model.CreateTopicRequest;
import com.amazonaws.services.sns.model.CreateTopicResult;
import com.amazonaws.services.sns.model.DeleteTopicRequest;
import com.amazonaws.services.sns.model.SubscribeRequest;
import com.amazonaws.services.sns.model.SubscribeResult;
import com.amazonaws.services.sns.model.UnsubscribeRequest;
import com.amazonaws.services.sqs.AmazonSQSClient;
import com.amazonaws.services.sqs.model.CreateQueueRequest;
import com.amazonaws.services.sqs.model.CreateQueueResult;
import com.amazonaws.services.sqs.model.DeleteQueueRequest;
import com.amazonaws.services.sqs.model.GetQueueAttributesRequest;
import com.amazonaws.services.sqs.model.GetQueueAttributesResult;
import com.amazonaws.services.sqs.model.Message;
import com.amazonaws.services.sqs.model.ReceiveMessageRequest;
import com.amazonaws.services.sqs.model.SetQueueAttributesRequest;
public class ArchiveDownloadLowLevelWithRange {
public static String vaultName = "*** provide vault name ***";
public static String archiveId = "*** provide archive id ***";
public static String snsTopicName = "glacier-temp-sns-topic";
public static String sqsQueueName = "glacier-temp-sqs-queue";
public static long downloadChunkSize = 4194304; // 4 MB
public static String sqsQueueARN;
public static String sqsQueueURL;
public static String snsTopicARN;
public static String snsSubscriptionARN;
public static String fileName = "*** provide file name to save archive to ***";
public static String region = "*** region ***";
public static long sleepTime = 600;
public static AmazonGlacierClient client;
public static AmazonSQSClient sqsClient;
public static AmazonSNSClient snsClient;
public static void main(String[] args) throws IOException {
ProfileCredentialsProvider credentials = new ProfileCredentialsProvider();
client = new AmazonGlacierClient(credentials);
client.setEndpoint("https://glacier." + region + ".amazonaws.com");
sqsClient = new AmazonSQSClient(credentials);
sqsClient.setEndpoint("https://sqs." + region + ".amazonaws.com");
snsClient = new AmazonSNSClient(credentials);
snsClient.setEndpoint("https://sns." + region + ".amazonaws.com");
try {
setupSQS();
setupSNS();
String jobId = initiateJobRequest();
System.out.println("Jobid = " + jobId);
long archiveSizeInBytes = waitForJobToComplete(jobId, sqsQueueURL);
if (archiveSizeInBytes==-1) { throw new Exception("Job did not complete successfully."); }
downloadJobOutput(jobId, archiveSizeInBytes);
cleanUp();
} catch (Exception e) {
System.err.println("Archive retrieval failed.");
System.err.println(e);
}
}
private static void setupSQS() {
CreateQueueRequest request = new CreateQueueRequest()
.withQueueName(sqsQueueName);
CreateQueueResult result = sqsClient.createQueue(request);
sqsQueueURL = result.getQueueUrl();
GetQueueAttributesRequest qRequest = new GetQueueAttributesRequest()
.withQueueUrl(sqsQueueURL)
.withAttributeNames("QueueArn");
GetQueueAttributesResult qResult = sqsClient.getQueueAttributes(qRequest);
sqsQueueARN = qResult.getAttributes().get("QueueArn");
Policy sqsPolicy =
new Policy().withStatements(
new Statement(Effect.Allow)
.withPrincipals(Principal.AllUsers)
.withActions(SQSActions.SendMessage)
.withResources(new Resource(sqsQueueARN)));
Map queueAttributes = new HashMap();
queueAttributes.put("Policy", sqsPolicy.toJson());
sqsClient.setQueueAttributes(new SetQueueAttributesRequest(sqsQueueURL, queueAttributes));
}
private static void setupSNS() {
CreateTopicRequest request = new CreateTopicRequest()
.withName(snsTopicName);
CreateTopicResult result = snsClient.createTopic(request);
snsTopicARN = result.getTopicArn();
SubscribeRequest request2 = new SubscribeRequest()
.withTopicArn(snsTopicARN)
.withEndpoint(sqsQueueARN)
.withProtocol("sqs");
SubscribeResult result2 = snsClient.subscribe(request2);
snsSubscriptionARN = result2.getSubscriptionArn();
}
private static String initiateJobRequest() {
JobParameters jobParameters = new JobParameters()
.withType("archive-retrieval")
.withArchiveId(archiveId)
.withSNSTopic(snsTopicARN);
InitiateJobRequest request = new InitiateJobRequest()
.withVaultName(vaultName)
.withJobParameters(jobParameters);
InitiateJobResult response = client.initiateJob(request);
return response.getJobId();
}
private static long waitForJobToComplete(String jobId, String sqsQueueUrl) throws InterruptedException, JsonParseException, IOException {
Boolean messageFound = false;
Boolean jobSuccessful = false;
long archiveSizeInBytes = -1;
ObjectMapper mapper = new ObjectMapper();
JsonFactory factory = mapper.getFactory();
while (!messageFound) {
List msgs = sqsClient.receiveMessage(
new ReceiveMessageRequest(sqsQueueUrl).withMaxNumberOfMessages(10)).getMessages();
if (msgs.size() > 0) {
for (Message m : msgs) {
JsonParser jpMessage = factory.createJsonParser(m.getBody());
JsonNode jobMessageNode = mapper.readTree(jpMessage);
String jobMessage = jobMessageNode.get("Message").textValue();
JsonParser jpDesc = factory.createJsonParser(jobMessage);
JsonNode jobDescNode = mapper.readTree(jpDesc);
String retrievedJobId = jobDescNode.get("JobId").textValue();
String statusCode = jobDescNode.get("StatusCode").textValue();
archiveSizeInBytes = jobDescNode.get("ArchiveSizeInBytes").longValue();
if (retrievedJobId.equals(jobId)) {
messageFound = true;
if (statusCode.equals("Succeeded")) {
jobSuccessful = true;
}
}
}
} else {
Thread.sleep(sleepTime * 1000);
}
}
return (messageFound && jobSuccessful) ? archiveSizeInBytes : -1;
}
private static void downloadJobOutput(String jobId, long archiveSizeInBytes) throws IOException {
if (archiveSizeInBytes < 0) {
System.err.println("Nothing to download.");
return;
}
System.out.println("archiveSizeInBytes: " + archiveSizeInBytes);
FileOutputStream fstream = new FileOutputStream(fileName);
long startRange = 0;
long endRange = (downloadChunkSize > archiveSizeInBytes) ? archiveSizeInBytes -1 : downloadChunkSize - 1;
do {
GetJobOutputRequest getJobOutputRequest = new GetJobOutputRequest()
.withVaultName(vaultName)
.withRange("bytes=" + startRange + "-" + endRange)
.withJobId(jobId);
GetJobOutputResult getJobOutputResult = client.getJobOutput(getJobOutputRequest);
BufferedInputStream is = new BufferedInputStream(getJobOutputResult.getBody());
byte[] buffer = new byte[(int)(endRange - startRange + 1)];
System.out.println("Checksum received: " + getJobOutputResult.getChecksum());
System.out.println("Content range " + getJobOutputResult.getContentRange());
int totalRead = 0;
while (totalRead < buffer.length) {
int bytesRemaining = buffer.length - totalRead;
int read = is.read(buffer, totalRead, bytesRemaining);
if (read > 0) {
totalRead = totalRead + read;
} else {
break;
}
}
System.out.println("Calculated checksum: " + TreeHashGenerator.calculateTreeHash(new ByteArrayInputStream(buffer)));
System.out.println("read = " + totalRead);
fstream.write(buffer);
startRange = startRange + (long)totalRead;
endRange = ((endRange + downloadChunkSize) > archiveSizeInBytes) ? archiveSizeInBytes : (endRange + downloadChunkSize);
is.close();
} while (endRange <= archiveSizeInBytes && startRange < archiveSizeInBytes);
fstream.close();
System.out.println("Retrieved file to " + fileName);
}
private static void cleanUp() {
snsClient.unsubscribe(new UnsubscribeRequest(snsSubscriptionARN));
snsClient.deleteTopic(new DeleteTopicRequest(snsTopicARN));
sqsClient.deleteQueue(new DeleteQueueRequest(sqsQueueURL));
}
}
```