Examples with SimpleStatement com.datastax.oss.driver.api.core.cql.SimpleStatement used on opensource projects

Example 6 with SimpleStatement

use of com.datastax.oss.driver.api.core.cql.SimpleStatement in project rocketmq-externals by apache.

the class Updater method deleteRow.

private boolean deleteRow(String dbName, String tableName, Map<Field, Object[]> fieldMap) {
    DeleteSelection deleteSelection = QueryBuilder.deleteFrom(dbName, tableName);
    Delete delete = null;
    int count = 0;
    for (Map.Entry<Field, Object[]> entry : fieldMap.entrySet()) {
        count++;
        String fieldName = entry.getKey().getName();
        FieldType fieldType = entry.getKey().getType();
        Object fieldValue = entry.getValue()[1];
        if (count == 1) {
            delete = deleteSelection.whereColumn(fieldName).isEqualTo(buildTerm(fieldType, fieldValue));
        } else {
            delete = delete.whereColumn(fieldName).isEqualTo(buildTerm(fieldType, fieldValue));
        }
    }
    boolean finishDelete = false;
    SimpleStatement stmt = delete.build();
    try {
        while (!cqlSession.isClosed() && !finishDelete) {
            ResultSet result = cqlSession.execute(stmt);
            if (result.wasApplied()) {
                log.info("delete from table success, executed query {}", delete);
                return true;
            }
            finishDelete = true;
        }
    } catch (Exception e) {
        log.error("delete from table error,{}", e);
    }
    return false;
}

Example 7 with SimpleStatement

use of com.datastax.oss.driver.api.core.cql.SimpleStatement in project rocketmq-externals by apache.

the class Updater method updateRow.

/**
 * Since we have no way of getting the id of a record, and we cannot get the primary key list of a table,
 * even we can it is not extensible. So we the result sql sentense would be like
 * UPDATE dbName.tableName SET afterUpdateValues WHERE beforeUpdateValues.
 */
private Boolean updateRow(String dbName, String tableName, Map<Field, Object[]> fieldMap) {
    log.info("Updater.updateRow() get called ");
    int count = 0;
    InsertInto insert = QueryBuilder.insertInto(dbName, tableName);
    RegularInsert regularInsert = null;
    for (Map.Entry<Field, Object[]> entry : fieldMap.entrySet()) {
        count++;
        String fieldName = entry.getKey().getName();
        FieldType fieldType = entry.getKey().getType();
        Object fieldValue = entry.getValue()[1];
        if (count == 1) {
            regularInsert = insert.value(fieldName, buildTerm(fieldType, fieldValue));
        } else {
            regularInsert = regularInsert.value(fieldName, buildTerm(fieldType, fieldValue));
        }
    }
    SimpleStatement stmt;
    boolean finishUpdate = false;
    log.info("trying to execute sql query,{}", regularInsert.asCql());
    try {
        while (!cqlSession.isClosed() && !finishUpdate) {
            stmt = regularInsert.build();
            ResultSet result = cqlSession.execute(stmt);
            if (result.wasApplied()) {
                log.info("update table success, executed cql query {}", regularInsert.asCql());
                return true;
            }
            finishUpdate = true;
        }
    } catch (Exception e) {
        log.error("update table error,{}", e);
    }
    return false;
}

Example 8 with SimpleStatement

use of com.datastax.oss.driver.api.core.cql.SimpleStatement in project rocketmq-externals by apache.

the class Database method init.

public void init() {
    Select selectFrom = QueryBuilder.selectFrom(SCHEMA_SYSTEM_SCHEMA, TABLE_COLUMNS).all().whereColumn(COLUMN_KEYSPACE_NAME).isEqualTo(QueryBuilder.literal(name));
    SimpleStatement stmt;
    boolean finishUpdate = false;
    LOGGER.info("trying to execute sql query,{}", selectFrom.asCql());
    ResultSet result = null;
    try {
        while (!cqlSession.isClosed() && !finishUpdate) {
            stmt = selectFrom.build();
            result = cqlSession.execute(stmt);
            if (result.wasApplied()) {
                LOGGER.info("query columns success, executed cql query {}", selectFrom.asCql());
            }
            finishUpdate = true;
        }
        for (Row row : result) {
            String tableName = row.getString(COLUMN_TABLE_NAME);
            String columnName = row.getString(COLUMN_COLUMN_NAME);
            String columnType = row.getString(COLUMN_TYPE);
            ColumnParser columnParser = ColumnParser.getColumnParser(columnType, columnType, GENERAL_CHARSET);
            if (!tableWhiteList.contains(tableName)) {
                continue;
            }
            if (!tableMap.containsKey(tableName)) {
                addTable(tableName);
            }
            Table table = tableMap.get(tableName);
            table.addCol(columnName);
            table.addParser(columnParser);
            table.addRawDataType(columnType);
            table.setFilterMap(tableFilterMap.get(tableName));
        }
    } catch (Exception e) {
        LOGGER.error("init cassandra Schema failure,{}", e);
    }
}