package redis.clients.util;
import redis.clients.jedis.HostAndPort;
public class ClusterNodeInformationParser {
private static final String SLOT_IMPORT_IDENTIFIER = "-<-";
private static final String SLOT_IN_TRANSITION_IDENTIFIER = "[";
public static final int SLOT_INFORMATIONS_START_INDEX = 8;
public static final int HOST_AND_PORT_INDEX = 1;
public ClusterNodeInformation parse(String nodeInfo, HostAndPort current) {
String[] nodeInfoPartArray = nodeInfo.split(" ");
HostAndPort node = getHostAndPortFromNodeLine(nodeInfoPartArray,
current);
ClusterNodeInformation info = new ClusterNodeInformation(node);
if (nodeInfoPartArray.length >= SLOT_INFORMATIONS_START_INDEX) {
String[] slotInfoPartArray = extractSlotParts(nodeInfoPartArray);
fillSlotInformation(slotInfoPartArray, info);
}
return info;
}
private String[] extractSlotParts(String[] nodeInfoPartArray) {
String[] slotInfoPartArray = new String[nodeInfoPartArray.length
- SLOT_INFORMATIONS_START_INDEX];
for (int i = SLOT_INFORMATIONS_START_INDEX; i < nodeInfoPartArray.length; i++) {
slotInfoPartArray[i - SLOT_INFORMATIONS_START_INDEX] = nodeInfoPartArray[i];
}
return slotInfoPartArray;
}
public HostAndPort getHostAndPortFromNodeLine(String[] nodeInfoPartArray,
HostAndPort current) {
String stringHostAndPort = nodeInfoPartArray[HOST_AND_PORT_INDEX];
String[] arrayHostAndPort = stringHostAndPort.split(":");
return new HostAndPort(
arrayHostAndPort[0].isEmpty() ? current.getHost()
: arrayHostAndPort[0],
arrayHostAndPort[1].isEmpty() ? current.getPort() : Integer
.valueOf(arrayHostAndPort[1]));
}
private void fillSlotInformation(String[] slotInfoPartArray,
ClusterNodeInformation info) {
for (String slotRange : slotInfoPartArray) {
fillSlotInformationFromSlotRange(slotRange, info);
}
}
private void fillSlotInformationFromSlotRange(String slotRange,
ClusterNodeInformation info) {
if (slotRange.startsWith(SLOT_IN_TRANSITION_IDENTIFIER)) {
// slot is in transition
int slot = Integer.parseInt(slotRange.substring(1).split("-")[0]);
if (slotRange.contains(SLOT_IMPORT_IDENTIFIER)) {
// import
info.addSlotBeingImported(slot);
} else {
// migrate (->-)
info.addSlotBeingMigrated(slot);
}
} else if (slotRange.contains("-")) {
// slot range
String[] slotRangePart = slotRange.split("-");
for (int slot = Integer.valueOf(slotRangePart[0]); slot <= Integer
.valueOf(slotRangePart[1]); slot++) {
info.addAvailableSlot(slot);
}
} else {
// single slot
info.addAvailableSlot(Integer.valueOf(slotRange));
}
}
}