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package org.apache.tuscany.nosqldatastore.cassandra;
import me.prettyprint.cassandra.serializers.StringSerializer;
import me.prettyprint.cassandra.service.template.ColumnFamilyResult;
import me.prettyprint.cassandra.service.template.ColumnFamilyTemplate;
import me.prettyprint.cassandra.service.template.ColumnFamilyUpdater;
import me.prettyprint.cassandra.service.template.ThriftColumnFamilyTemplate;
import me.prettyprint.hector.api.Cluster;
import me.prettyprint.hector.api.Keyspace;
import me.prettyprint.hector.api.ddl.ColumnFamilyDefinition;
import me.prettyprint.hector.api.exceptions.HInvalidRequestException;
import me.prettyprint.hector.api.factory.HFactory;
import org.apache.tuscany.nosqldatastore.Group;
class CassandraGroup implements Group {
private ColumnFamilyTemplate<String,String> template;
private ColumnFamilyUpdater<String, String> updater;
private final StringSerializer se = StringSerializer.get();
CassandraGroup(String groupId, Keyspace keyspace, Cluster cluster) {
try{
ColumnFamilyDefinition cfDef = HFactory.createColumnFamilyDefinition(keyspace.getKeyspaceName(), groupId);
cluster.addColumnFamily(cfDef);
}catch (HInvalidRequestException e){
System.out.println("Connect to the existing group...");
}
template = new ThriftColumnFamilyTemplate<String, String>(keyspace,groupId,se,se,HFactory.createMutator(keyspace, se));
}
public void addEntry(String key, Object value) {
updater = template.createUpdater(key);
updater.setString(key, (String) value);
template.update(updater);
template.addColumn(key, se);
}
public void deleteEntry(String key) {
template.deleteColumn(key, key);
}
public Object getValue(String key) {
ColumnFamilyResult wrapper = template.queryColumns(key);
return wrapper.getString(key);
}
public void updateEntry(String key, Object value) {
addEntry(key, value);
}
}
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