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package org.openecomp.core.tools.importinfo;
import static org.openecomp.core.tools.exportinfo.ExportDataCommand.NULL_REPRESENTATION;
import com.datastax.driver.core.BoundStatement;
import com.datastax.driver.core.DataType.Name;
import com.datastax.driver.core.PreparedStatement;
import com.datastax.driver.core.Session;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableMap.Builder;
import com.google.common.collect.Sets;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.file.Path;
import java.util.Base64;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import org.apache.commons.lang3.StringUtils;
import org.codehaus.jackson.map.ObjectMapper;
import org.openecomp.core.nosqldb.impl.cassandra.CassandraSessionFactory;
import org.openecomp.core.tools.exportinfo.ExportDataCommand;
import org.openecomp.core.tools.model.ColumnDefinition;
import org.openecomp.core.tools.model.TableData;
import org.openecomp.core.tools.util.Utils;
import org.openecomp.sdc.logging.api.Logger;
import org.openecomp.sdc.logging.api.LoggerFactory;
public class ImportSingleTable {
private static final Logger logger = LoggerFactory.getLogger(ImportSingleTable.class);
private static final String INSERT_INTO = "INSERT INTO ";
private static final String VALUES = " VALUES ";
private static final Map<String, PreparedStatement> statementsCache = new HashMap<>();
public void importFile(Path file) {
try {
ObjectMapper objectMapper = new ObjectMapper();
TableData tableData = objectMapper.readValue(file.toFile(), TableData.class);
Session session = CassandraSessionFactory.getSession();
PreparedStatement ps = getPrepareStatement(tableData, session);
tableData.rows.forEach(row -> executeQuery(session, ps, tableData.definitions, row));
} catch (IOException e) {
Utils.logError(logger, e);
}
}
private PreparedStatement getPrepareStatement(TableData tableData, Session session) {
String query = createQuery(tableData);
if (statementsCache.containsKey(query)) {
return statementsCache.get(query);
}
PreparedStatement preparedStatement = session.prepare(query);
statementsCache.put(query, preparedStatement);
return preparedStatement;
}
private void executeQuery(Session session, PreparedStatement ps, List<ColumnDefinition> definitions, List<String> rows) {
BoundStatement bind = ps.bind();
for (int i = 0; i < definitions.size(); i++) {
ColumnDefinition columnDefinition = definitions.get(i);
String rowData = rows.get(i);
Name name = dataTypesMap.get(columnDefinition.getType());
handleByType(bind, i, rowData, name);
}
session.execute(bind);
}
private void handleByType(BoundStatement bind, int i, String rowData, Name name) {
switch (name) {
case VARCHAR:
case TEXT:
case ASCII:
String string = new String(Base64.getDecoder().decode(rowData));
bind.setString(i, NULL_REPRESENTATION.equals(string) ? null : string);
break;
case BLOB:
bind.setBytes(i, ByteBuffer.wrap(Base64.getDecoder().decode(rowData.getBytes())));
break;
case TIMESTAMP:
if (StringUtils.isEmpty(rowData)){
bind.setTimestamp(i, null);
} else {
bind.setTimestamp(i, new Date(Long.parseLong(rowData)));
}
break;
case BOOLEAN:
bind.setBool(i, Boolean.parseBoolean(rowData));
break;
case COUNTER:
bind.setLong(i, Long.parseLong(rowData));
break;
case INT:
bind.setInt(i, Integer.parseInt(rowData));
break;
case FLOAT:
bind.setFloat(i, Float.parseFloat(rowData));
break;
case SET:
byte[] decoded = Base64.getDecoder().decode(rowData);
String decodedStr = new String(decoded);
if (!StringUtils.isEmpty(decodedStr)) {
String[] splitted = decodedStr.split(ExportDataCommand.JOIN_DELIMITER_SPLITTER);
Set set = Sets.newHashSet(splitted);
set.remove("");
bind.setSet(i, set);
} else {
bind.setSet(i, null);
}
break;
case MAP:
byte[] decodedMap = Base64.getDecoder().decode(rowData);
String mapStr = new String(decodedMap);
if (!StringUtils.isEmpty(mapStr)) {
String[] splittedMap = mapStr.split(ExportDataCommand.JOIN_DELIMITER_SPLITTER);
Map<String, String> map = new HashMap<>();
for (String keyValue : splittedMap) {
String[] split = keyValue.split(ExportDataCommand.MAP_DELIMITER_SPLITTER);
map.put(split[0], split[1]);
}
bind.setMap(i, map);
} else {
bind.setMap(i, null);
}
break;
default:
throw new UnsupportedOperationException("Name is not supported :" + name);
}
}
private String createQuery(TableData tableData) {
ColumnDefinition def = tableData.definitions.iterator().next();
StringBuilder sb = new StringBuilder();
sb.append(INSERT_INTO).append(def.getKeyspace()).append(".").append(def.getTable());
sb.append(tableData.definitions.stream().map(ColumnDefinition::getName).collect(Collectors.joining(" , ", " ( ", " ) ")));
sb.append(VALUES).append(tableData.definitions.stream().map(definition -> "?").collect(Collectors.joining(" , ", " ( ", " ) "))).append(";");
return sb.toString();
}
public static final ImmutableMap<String, Name> dataTypesMap;
static {
Builder<String, Name> builder = ImmutableMap.builder();
Name[] values = Name.values();
for (Name name : values) {
builder.put(name.name().toLowerCase(), name);
}
dataTypesMap = builder.build();
}
}
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