demo-tabledata-redis/src/main/java/com/fr/plugin/db/redis/core/RedisTableDataModel.java

package com.fr.plugin.db.redis.core;

import com.fanruan.api.data.open.BaseDataModel;
import com.fanruan.api.log.LogKit;
import com.fanruan.api.util.StringKit;
import com.fr.plugin.context.PluginContexts;
import com.fr.plugin.db.redis.core.emb.Redis;
import com.fr.plugin.db.redis.core.visit.VisitorFactory;
import com.fr.stable.ParameterProvider;
import com.fr.stable.script.CalculatorProvider;

import java.util.List;

public class RedisTableDataModel extends BaseDataModel {
    private String[] columnNames;
    private List<List<Object>> data;

    public RedisTableDataModel(CalculatorProvider calculator, ParameterProvider[] ps, RedisDatabaseConnection mc, int dbIndex, String query, String script, int rowCount) {
        if (PluginContexts.currentContext().isAvailable()) {
            initRedisData(calculator, ps, mc, dbIndex, query, script, rowCount);
        } else {
            throw new RuntimeException("Redis Plugin License Expired!");
        }
    }

    private synchronized void initRedisData(CalculatorProvider calculator, ParameterProvider[] ps, RedisDatabaseConnection mc, int dbIndex, String query, String script, int rowCount) {
        if (StringKit.isEmpty(query)) {
            return;
        }
        Redis redis = mc.createRedisClient();
        redis.getClient().select(dbIndex);
        LogKit.info("Connect to redis and select database:" + dbIndex);
        try {
            long start = System.currentTimeMillis();
            DataWrapper<Object> wrapper = VisitorFactory.getKeyValueResult(calculator, ps, redis.getClient(), query, rowCount);
            LogKit.info("Fetch data from redis spend time {} ms.", System.currentTimeMillis() - start);
            wrapper.transform(script);
            data = wrapper.getData();
            columnNames = wrapper.getColumnNames();
            redis.close();
        } catch (Exception e) {
            throw new RuntimeException(e.getCause());
        }
    }

    @Override
    public int getColumnCount() {
        return columnNames.length;
    }

    @Override
    public String getColumnName(int columnIndex) {
        return columnNames[columnIndex];
    }

    @Override
    public boolean hasRow(int rowIndex) {
        return data != null && data.get(0).size() > rowIndex;
    }

    @Override
    public int getRowCount() {
        return data == null ? 0 : data.get(0).size();
    }

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        if (data != null && data.size() > columnIndex) {
            List<Object> columnData = data.get(columnIndex);
            if (columnData != null && columnData.size() > rowIndex) {
                return columnData.get(rowIndex);
            }
        }
        return null;
    }

    @Override
    public void release() throws Exception {

    }
}