/**
* Configure the history length for a specific entry. If the length is 0 disable history for this
* key
*
* @param pKey history key
* @param pMaxEntries number of maximal entries. If larger than globalMaxEntries, then
* globalMaxEntries is used instead.
*/
public synchronized void configure(HistoryKey pKey, int pMaxEntries) {
int maxEntries = pMaxEntries > globalMaxEntries ? globalMaxEntries : pMaxEntries;
// Remove entries if set to 0
if (pMaxEntries == 0) {
removeEntries(pKey);
return;
}
if (pKey.isMBeanPattern()) {
patterns.put(pKey, maxEntries);
// Trim all already stored keys
for (HistoryKey key : historyStore.keySet()) {
if (pKey.matches(key)) {
HistoryEntry entry = historyStore.get(key);
entry.setMaxEntries(maxEntries);
entry.trim();
}
}
} else {
HistoryEntry entry = historyStore.get(pKey);
if (entry != null) {
entry.setMaxEntries(maxEntries);
entry.trim();
} else {
entry = new HistoryEntry(maxEntries);
historyStore.put(pKey, entry);
}
}
}
private HistoryEntry getEntry(HistoryKey pKey, Object pValue, long pTimestamp) {
HistoryEntry entry = historyStore.get(pKey);
if (entry != null) {
return entry;
}
// Now try all known patterns and add lazily the key
for (HistoryKey key : patterns.keySet()) {
if (key.matches(pKey)) {
entry = new HistoryEntry(patterns.get(key));
entry.add(pValue, pTimestamp);
historyStore.put(pKey, entry);
return entry;
}
}
return null;
}
/**
* Update the history store with the value of an an read, write or execute operation. Also, the
* timestamp of the insertion is recorded. Also, the recorded history values are added to the
* given json value.
*
* @param pJmxReq request for which an entry should be added in this history store
* @param pJson the JSONObject to which to add the history.
*/
public synchronized void updateAndAdd(JmxRequest pJmxReq, JSONObject pJson) {
long timestamp = System.currentTimeMillis() / 1000;
pJson.put(KEY_TIMESTAMP, timestamp);
JmxRequest.Type type = pJmxReq.getType();
if (type == EXEC || type == WRITE) {
HistoryEntry entry = historyStore.get(new HistoryKey(pJmxReq));
if (entry != null) {
synchronized (entry) {
// A history data to json object for the response
pJson.put(KEY_HISTORY, entry.jsonifyValues());
// Update history for next time
if (type == EXEC) {
entry.add(pJson.get(KEY_VALUE), timestamp);
} else if (type == WRITE) {
// The new value to set as string representation
entry.add(pJmxReq.getValue(), timestamp);
}
}
}
} else if (type == READ) {
updateReadHistory(pJmxReq, pJson, timestamp);
}
}
/**
* Set the global maximum limit for history entries
*
* @param pGlobalMaxEntries limit
*/
public synchronized void setGlobalMaxEntries(int pGlobalMaxEntries) {
globalMaxEntries = pGlobalMaxEntries;
// Refresh all entries
for (HistoryEntry entry : historyStore.values()) {
entry.setMaxEntries(globalMaxEntries);
entry.trim();
}
}
// Remove entries
private void removeEntries(HistoryKey pKey) {
if (pKey.isMBeanPattern()) {
patterns.remove(pKey);
List<HistoryKey> toRemove = new ArrayList<HistoryKey>();
for (HistoryKey key : historyStore.keySet()) {
if (pKey.matches(key)) {
toRemove.add(key);
}
}
// Avoid concurrent modification exceptions
for (HistoryKey key : toRemove) {
historyStore.remove(key);
}
} else {
HistoryEntry entry = historyStore.get(pKey);
if (entry != null) {
historyStore.remove(pKey);
}
}
}
private JSONObject addAttributesFromComplexValue(
JmxRequest pJmxReq, Map<String, Object> pAttributesMap, String pBeanName, long pTimestamp) {
JSONObject ret = new JSONObject();
for (Map.Entry<String, Object> attrEntry : pAttributesMap.entrySet()) {
String attrName = attrEntry.getKey();
Object value = attrEntry.getValue();
HistoryKey key;
try {
key =
new HistoryKey(
pBeanName,
attrName,
null /* No path support for complex read handling */,
pJmxReq.getTargetConfigUrl());
} catch (MalformedObjectNameException e) {
// Shouldnt occur since we get the MBeanName from a JMX operation's result. However,
// we will rethrow it
throw new IllegalArgumentException("Cannot pars MBean name " + pBeanName, e);
}
addAttributeFromSingleValue(ret, attrName, key, value, pTimestamp);
}
return ret;
}
