HdfsTableValuedFunction.java

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package org.apache.doris.tablefunction;

import org.apache.doris.analysis.BrokerDesc;
import org.apache.doris.analysis.StorageBackend.StorageType;
import org.apache.doris.common.AnalysisException;
import org.apache.doris.common.FeConstants;
import org.apache.doris.common.UserException;
import org.apache.doris.datasource.property.storage.StorageProperties;
import org.apache.doris.thrift.TFileType;

import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;

import java.util.Map;

/**
 * The Implement of table valued function
 * hdfs("uri" = "xxx", "hadoop.username" = "xx", "FORMAT" = "csv").
 */
public class HdfsTableValuedFunction extends ExternalFileTableValuedFunction {
    public static final Logger LOG = LogManager.getLogger(HdfsTableValuedFunction.class);
    public static final String NAME = "hdfs";

    public HdfsTableValuedFunction(Map<String, String> properties) throws AnalysisException {
        init(properties);
    }

    private void init(Map<String, String> properties) throws AnalysisException {
        // 1. analyze common properties
        Map<String, String> props = super.parseCommonProperties(properties);
        // 2. analyze uri
        try {
            this.storageProperties = StorageProperties.createPrimary(props);
            backendConnectProperties.putAll(storageProperties.getBackendConfigProperties());
            String uri = storageProperties.validateAndGetUri(props);
            filePath = storageProperties.validateAndNormalizeUri(uri);
        } catch (UserException e) {
            throw new AnalysisException("Failed check storage props, " + e.getMessage(), e);
        }

        if (!FeConstants.runningUnitTest) {
            // 4. parse file
            parseFile();
        }
    }

    // =========== implement abstract methods of ExternalFileTableValuedFunction =================
    @Override
    public TFileType getTFileType() {
        return TFileType.FILE_HDFS;
    }

    @Override
    public String getFilePath() {
        // must be "hdfs://namenode/filepath"
        return filePath;
    }

    @Override
    public BrokerDesc getBrokerDesc() {
        return new BrokerDesc("HdfsTvfBroker", StorageType.HDFS, processedParams);
    }

    // =========== implement abstract methods of TableValuedFunctionIf =================
    @Override
    public String getTableName() {
        return "HDFSTableValuedFunction";
    }
}