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package org.dcache.resilience.data;
import com.google.common.collect.ImmutableMap;
import java.util.Date;
import java.util.Map;
import diskCacheV111.pools.PoolCostInfo;
import diskCacheV111.pools.PoolV2Mode;
/**
* <p>Encapsulates "live" pool information – pool mode, status, and cost.
* Also stores pool tags.</p>
*
* <p>This object is held by the {@link PoolInfoMap}; status, mode, tags
* and cost are refreshed during the Pool Monitor updates.</p>
*/
final class PoolInformation {
public static final String UNINITIALIZED = "UNINITIALIZED";
private static final String TOSTRING
= "key\t\t%s\nname\t\t%s\ntags\t\t%s\nmode\t\t%s\n"
+ "status\t\t%s\nlast update\t%s\n";
private final String name;
private final Integer key;
private PoolStatusForResilience status;
private PoolV2Mode mode;
private boolean excluded;
private ImmutableMap<String, String> tags;
private PoolCostInfo costInfo;
private long lastUpdate;
PoolInformation(String name, Integer key) {
this.name = name;
this.key = key;
lastUpdate = System.currentTimeMillis();
excluded = false;
}
public synchronized String toString() {
if (!isInitialized()) {
return String.format(TOSTRING,
key, name, "", "", UNINITIALIZED, "");
}
return String.format(TOSTRING,
key, name, tags, mode,
excluded ? "EXCLUDED" : status,
new Date(lastUpdate));
}
synchronized boolean canRead() {
return mode != null
&& (mode.isEnabled()
|| mode.getMode() == PoolV2Mode.DISABLED_RDONLY);
}
synchronized boolean canWrite() {
return mode != null && mode.isEnabled();
}
synchronized PoolCostInfo getCostInfo() {
return costInfo;
}
synchronized long getLastUpdate() {
return lastUpdate;
}
Integer getKey() {
return key;
}
synchronized PoolV2Mode getMode() {
return mode;
}
String getName() {
return name;
}
synchronized PoolStatusForResilience getStatus() {
return status;
}
synchronized ImmutableMap<String, String> getTags() {
return tags;
}
synchronized boolean isCountable() {
return canRead() || excluded;
}
synchronized boolean isInitialized() {
return mode != null && tags != null && costInfo != null;
}
synchronized void setExcluded(boolean excluded) {
this.excluded = excluded;
}
synchronized void update(PoolV2Mode mode, Map<String, String> tags,
PoolCostInfo costInfo) {
updatePoolMode(mode);
updateTags(tags);
if (costInfo != null) {
this.costInfo = costInfo;
}
lastUpdate = System.currentTimeMillis();
}
synchronized void updateState(PoolStateUpdate update) {
updatePoolMode(update.mode);
lastUpdate = System.currentTimeMillis();
}
private void updatePoolMode(PoolV2Mode mode) {
if (mode != null) {
this.mode = mode;
status = PoolStatusForResilience.getStatusFor(mode);
}
}
private void updateTags(Map<String, String> tags) {
if (tags != null) {
this.tags = ImmutableMap.copyOf(tags);
}
}
}