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| 1 | +package com.datamate.plugin.reader.obsreader; |
| 2 | + |
| 3 | +import java.io.IOException; |
| 4 | +import java.net.URI; |
| 5 | +import java.nio.file.Files; |
| 6 | +import java.nio.file.Path; |
| 7 | +import java.nio.file.Paths; |
| 8 | +import java.util.ArrayList; |
| 9 | +import java.util.Collections; |
| 10 | +import java.util.HashSet; |
| 11 | +import java.util.List; |
| 12 | +import java.util.Set; |
| 13 | +import java.util.stream.Collectors; |
| 14 | + |
| 15 | +import com.alibaba.datax.common.element.Record; |
| 16 | +import com.alibaba.datax.common.element.StringColumn; |
| 17 | +import com.alibaba.datax.common.exception.CommonErrorCode; |
| 18 | +import com.alibaba.datax.common.exception.DataXException; |
| 19 | +import com.alibaba.datax.common.plugin.RecordSender; |
| 20 | +import com.alibaba.datax.common.spi.Reader; |
| 21 | +import com.alibaba.datax.common.util.Configuration; |
| 22 | + |
| 23 | +import org.apache.commons.lang3.StringUtils; |
| 24 | +import org.slf4j.Logger; |
| 25 | +import org.slf4j.LoggerFactory; |
| 26 | + |
| 27 | +import software.amazon.awssdk.auth.credentials.AwsBasicCredentials; |
| 28 | +import software.amazon.awssdk.auth.credentials.StaticCredentialsProvider; |
| 29 | +import software.amazon.awssdk.core.sync.ResponseTransformer; |
| 30 | +import software.amazon.awssdk.regions.Region; |
| 31 | +import software.amazon.awssdk.services.s3.S3Client; |
| 32 | +import software.amazon.awssdk.services.s3.model.ListObjectsV2Request; |
| 33 | +import software.amazon.awssdk.services.s3.model.ListObjectsV2Response; |
| 34 | +import software.amazon.awssdk.services.s3.model.S3Object; |
| 35 | +import software.amazon.awssdk.services.s3.model.GetObjectRequest; |
| 36 | +import software.amazon.awssdk.services.s3.S3Configuration; |
| 37 | + |
| 38 | +public class ObsReader extends Reader { |
| 39 | + |
| 40 | + private static final Logger LOG = LoggerFactory.getLogger(ObsReader.class); |
| 41 | + |
| 42 | + public static class Job extends Reader.Job { |
| 43 | + private Configuration jobConfig = null; |
| 44 | + |
| 45 | + @Override |
| 46 | + public void init() { |
| 47 | + this.jobConfig = super.getPluginJobConf(); |
| 48 | + } |
| 49 | + |
| 50 | + @Override |
| 51 | + public void prepare() { |
| 52 | + } |
| 53 | + |
| 54 | + @Override |
| 55 | + public List<Configuration> split(int adviceNumber) { |
| 56 | + return Collections.singletonList(this.jobConfig); |
| 57 | + } |
| 58 | + |
| 59 | + @Override |
| 60 | + public void post() { |
| 61 | + } |
| 62 | + |
| 63 | + @Override |
| 64 | + public void destroy() { |
| 65 | + } |
| 66 | + } |
| 67 | + |
| 68 | + public static class Task extends Reader.Task { |
| 69 | + |
| 70 | + private Configuration jobConfig; |
| 71 | + private Set<String> fileType; |
| 72 | + private String endpoint; |
| 73 | + private String accessKey; |
| 74 | + private String secretKey; |
| 75 | + private String bucket; |
| 76 | + private String prefix; |
| 77 | + private S3Client s3; |
| 78 | + private String effectivePrefix; |
| 79 | + |
| 80 | + @Override |
| 81 | + public void init() { |
| 82 | + this.jobConfig = super.getPluginJobConf(); |
| 83 | + this.fileType = new HashSet<>(this.jobConfig.getList("fileType", Collections.emptyList(), String.class)); |
| 84 | + this.endpoint = this.jobConfig.getString("endpoint"); |
| 85 | + this.accessKey = this.jobConfig.getString("accessKey"); |
| 86 | + this.secretKey = this.jobConfig.getString("secretKey"); |
| 87 | + this.bucket = this.jobConfig.getString("bucket"); |
| 88 | + this.prefix = this.jobConfig.getString("prefix"); |
| 89 | + this.s3 = getS3Client(); |
| 90 | + this.effectivePrefix = getEffectivePrefix(); |
| 91 | + } |
| 92 | + |
| 93 | + @Override |
| 94 | + public void startRead(RecordSender recordSender) { |
| 95 | + try { |
| 96 | + List<String> files = listFiles().stream() |
| 97 | + .filter(file -> fileType.isEmpty() || fileType.contains(getFileSuffix(file))) |
| 98 | + .collect(Collectors.toList()); |
| 99 | + files.forEach(filePath -> { |
| 100 | + Record record = recordSender.createRecord(); |
| 101 | + record.addColumn(new StringColumn(filePath)); |
| 102 | + recordSender.sendToWriter(record); |
| 103 | + }); |
| 104 | + this.jobConfig.set("columnNumber", 1); |
| 105 | + } catch (Exception e) { |
| 106 | + LOG.error("Error reading files from obs file system: {}", this.endpoint, e); |
| 107 | + throw new RuntimeException(e); |
| 108 | + } |
| 109 | + } |
| 110 | + |
| 111 | + /** |
| 112 | + * 使用 AWS SDK v2 列举 S3/OBS 对象并将对象下载到 /dataset/local/。 |
| 113 | + * 非递归：只列举 prefix 当前目录下的对象（通过 delimiter="/" 实现）。 |
| 114 | + * 返回对象 key 列表（下载后文件名为 key 的最后一段）。 |
| 115 | + */ |
| 116 | + private List<String> listFiles() throws Exception { |
| 117 | + if (StringUtils.isBlank(endpoint) || StringUtils.isBlank(bucket)) { |
| 118 | + throw new IllegalArgumentException("endpoint and bucket must be provided"); |
| 119 | + } |
| 120 | + List<String> keys = new ArrayList<>(); |
| 121 | + String continuationToken = null; |
| 122 | + try { |
| 123 | + do { |
| 124 | + ListObjectsV2Request.Builder reqBuilder = ListObjectsV2Request.builder() |
| 125 | + .bucket(bucket) |
| 126 | + .prefix(effectivePrefix) |
| 127 | + .delimiter("/"); // 非递归：只列出当前目录下的对象（不下钻子目录） |
| 128 | + if (continuationToken != null) reqBuilder.continuationToken(continuationToken); |
| 129 | + ListObjectsV2Response res = s3.listObjectsV2(reqBuilder.build()); |
| 130 | + for (S3Object obj : res.contents()) { |
| 131 | + String key = obj.key(); |
| 132 | + if (isInValid(key)) continue; |
| 133 | + // 到此认为是“文件”key（且位于 prefix 当前目录） |
| 134 | + keys.add(key); |
| 135 | + } |
| 136 | + continuationToken = res.isTruncated() ? res.nextContinuationToken() : null; |
| 137 | + } while (continuationToken != null); |
| 138 | + } catch (Exception e) { |
| 139 | + LOG.warn("Failed to build S3 client or read object: {}", e.getMessage(), e); |
| 140 | + // 保持原行为，对下载失败记录 warn，但不抛出新的运行时错误（外层会捕获） |
| 141 | + } |
| 142 | + return keys; |
| 143 | + } |
| 144 | + |
| 145 | + private boolean isInValid(String key) { |
| 146 | + // 仅接受以 effectivePrefix 开头的 key（请求通常已保证），并排除目录占位符 |
| 147 | + if (!effectivePrefix.isEmpty() && !key.startsWith(effectivePrefix)) { |
| 148 | + return true; |
| 149 | + } |
| 150 | + if (key.equals(effectivePrefix) || key.endsWith("/")) { |
| 151 | + // 这是一个目录占位符或与 prefix 相同，跳过 |
| 152 | + return true; |
| 153 | + } |
| 154 | + return false; |
| 155 | + } |
| 156 | + |
| 157 | + private String getEffectivePrefix() { |
| 158 | + // 规范化 prefix：去掉前导 '/'，并确保以 '/' 结尾以表示目录前缀（如果非空） |
| 159 | + String effectivePrefix = ""; |
| 160 | + if (prefix != null) { |
| 161 | + effectivePrefix = prefix.startsWith("/") ? prefix.substring(1) : prefix; |
| 162 | + if (!effectivePrefix.isEmpty() && !effectivePrefix.endsWith("/")) { |
| 163 | + effectivePrefix = effectivePrefix + "/"; |
| 164 | + } |
| 165 | + } |
| 166 | + return effectivePrefix; |
| 167 | + } |
| 168 | + |
| 169 | + private S3Client getS3Client() { |
| 170 | + try { |
| 171 | + AwsBasicCredentials creds = AwsBasicCredentials.create(accessKey, secretKey); |
| 172 | + S3Configuration serviceConfig = S3Configuration.builder() |
| 173 | + .pathStyleAccessEnabled(true) |
| 174 | + .build(); |
| 175 | + return S3Client.builder() |
| 176 | + .endpointOverride(new URI(endpoint)) |
| 177 | + .region(Region.of("us-east-1")) |
| 178 | + .serviceConfiguration(serviceConfig) |
| 179 | + .credentialsProvider(StaticCredentialsProvider.create(creds)) |
| 180 | + .build(); |
| 181 | + } catch (Exception e) { |
| 182 | + LOG.error("Error init s3 client: {}", this.endpoint, e); |
| 183 | + throw DataXException.asDataXException(CommonErrorCode.RUNTIME_ERROR, e); |
| 184 | + } |
| 185 | + } |
| 186 | + |
| 187 | + private String getFileSuffix(String key) { |
| 188 | + String fileName = Paths.get(key).getFileName().toString(); |
| 189 | + int lastDotIndex = fileName.lastIndexOf('.'); |
| 190 | + if (lastDotIndex == -1 || lastDotIndex == fileName.length() - 1) { |
| 191 | + return ""; |
| 192 | + } |
| 193 | + return fileName.substring(lastDotIndex + 1); |
| 194 | + } |
| 195 | + |
| 196 | + @Override |
| 197 | + public void destroy() { |
| 198 | + if (s3 != null) { |
| 199 | + try { |
| 200 | + s3.close(); |
| 201 | + } catch (Exception ignore) { |
| 202 | + } |
| 203 | + } |
| 204 | + } |
| 205 | + } |
| 206 | +} |
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