com.hmsonline.cassandra.index.dao.impl.CommitLogDAOCassandra Maven / Gradle / Ivy

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package com.hmsonline.cassandra.index.dao.impl;

import org.apache.cassandra.thrift.ConsistencyLevel;
import org.apache.cassandra.utils.ByteBufferUtil;

import com.hmsonline.cassandra.index.LogEntry;
import com.hmsonline.cassandra.index.dao.CommitLogDAO;
import com.hmsonline.cassandra.index.util.IndexUtil;

public class CommitLogDAOCassandra extends AbstractCassandraDAO implements
        CommitLogDAO {
  public static final String KEYSPACE = IndexUtil.INDEXING_KEYSPACE;
  public static final String COLUMN_FAMILY = "CommitLog";

  public CommitLogDAOCassandra() {
    super(KEYSPACE, COLUMN_FAMILY);
  }

  public void writeEntry(LogEntry entry, ConsistencyLevel consistency) {
    try {
      insertColumn(ByteBufferUtil.bytes(entry.getEntryKey()),
              ByteBufferUtil.bytes(entry.getEntryName()),
              ByteBufferUtil.bytes(entry.getEntryValue()), consistency);
    }
    catch (Exception ex) {
      throw new RuntimeException("Failed to write commit log entry: "
              + entry.getEntryKey() + "[" + entry.getEntryName() + ", "
              + entry.getEntryValue() + "]", ex);
    }
  }

  public void removeEntry(LogEntry entry, ConsistencyLevel consistency) {
    try {
      deleteColumn(ByteBufferUtil.bytes(entry.getEntryKey()),
              ByteBufferUtil.bytes(entry.getEntryName()), consistency);
    }
    catch (Exception ex) {
      throw new RuntimeException("Failed to remove commit log entry: "
              + entry.getEntryKey() + "[" + entry.getEntryName() + "]", ex);
    }
  }
}