/*
* Copyright 2011 Future Systems
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.krakenapps.logdb.cmd;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import org.krakenapps.logdb.LogQueryCommand;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Cmd extends LogQueryCommand {
private final Logger logger = LoggerFactory.getLogger(Cmd.class.getName());
private Process p;
private Charset charset;
private int offset;
private int limit;
public Cmd(Process p, Charset charset, int offset, int limit) {
this.p = p;
this.charset = charset;
this.offset = offset;
this.limit = limit;
}
@Override
public void start() {
status = Status.Running;
try {
int i = 0;
int count = 0;
BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream(), charset));
while (true) {
String line = br.readLine();
if (line == null)
break;
if (i < offset) {
i++;
continue;
}
if (limit != 0 && count >= limit)
break;
LogMap m = new LogMap();
m.put("line", line);
write(m);
count++;
i++;
}
} catch (Throwable t) {
logger.error("kraken logdb cmd: cannot read process stdout", t);
}
p.destroy();
eof();
}
@Override
public void push(LogMap m) {
}
@Override
public boolean isReducer() {
return false;
}
}