本来这个内容是不单独讲的,但是因为上一个页面太大,导致Live Writer死机了,不能继续编辑了,所以就放弃了 这里要讲的是自定义filter,从FilterBase继承
public class CustomFilter extends FilterBase { private byte[] value = null; private boolean filterRow = true; public CustomFilter() { super(); } public CustomFilter(byte[] value) { this.value = value; } @Override public void reset() { this.filterRow = true; } @Override public ReturnCode filterKeyValue(KeyValue kv) { if (Bytes.compareTo(value, kv.getValue()) == 0) { filterRow = false; } return ReturnCode.INCLUDE; } @Override public boolean filterRow() { return filterRow; } @Override public void write(DataOutput dataOutput) throws IOException { Bytes.writeByteArray(dataOutput, this.value); } @Override public void readFields(DataInput dataInput) throws IOException { this.value = Bytes.readByteArray(dataInput); } }
然后打成jar包,要在hbase-env.sh中指明路径。 export HBASE_CLASSPATH="/hbase/target/hbase-customfilter.jar",然后就可以在客户端中使用它了。