/*
* Licensed to Crate under one or more contributor license agreements.
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership. Crate licenses this file
* to you 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial
* agreement.
*/
package io.crate.operation.reference.sys.node;
class NodeLoadStatsExpression extends NestedNodeStatsExpression {
private static final String ONE = "1";
private static final String FIVE = "5";
private static final String FIFTEEN = "15";
private static final String PROBE_TIMESTAMP = "probe_timestamp";
NodeLoadStatsExpression() {
childImplementations.put(ONE, new LoadStatsExpression(0));
childImplementations.put(FIVE, new LoadStatsExpression(1));
childImplementations.put(FIFTEEN, new LoadStatsExpression(2));
childImplementations.put(PROBE_TIMESTAMP, new SimpleNodeStatsExpression<Long>() {
@Override
public Long innerValue() {
return this.row.extendedOsStats().timestamp();
}
});
}
private static class LoadStatsExpression extends SimpleNodeStatsExpression<Double> {
private final int idx;
LoadStatsExpression(int idx) {
this.idx = idx;
}
@Override
public Double innerValue() {
try {
return this.row.extendedOsStats().loadAverage()[idx];
} catch (IndexOutOfBoundsException e) {
return -1d;
}
}
}
}