public class PageEvent {
public static final String TAG = Constants.getTag(PageEvent.class);
private final EventType mEventType;
private final String mViewSession;
private final int[] mPages;
private final Orientation mOrientation;
private final Clock mClock;
private boolean mCollected = false;
private boolean mStarted = false;
private boolean mStopped = false;
private long mStart = 0;
private long mStop = 0;
private ArrayList<PageEvent> mSubEvents = new ArrayList<PageEvent>();
public static PageEvent view(String viewSession, int[] pages, Orientation orientation, Clock c) {
return new PageEvent(EventType.VIEW, viewSession, orientation, pages, c);
}
public static PageEvent zoom(String viewSession, int[] pages, Orientation orientation, Clock c) {
return new PageEvent(EventType.ZOOM, viewSession, orientation, pages, c);
}
public PageEvent(
EventType type, String viewSession, Orientation orientation, int[] pages, Clock c) {
mEventType = type;
mViewSession = viewSession;
mPages = pages;
mOrientation = orientation;
mClock = c;
}
/**
* Start the timer for this event. This method can be called multiple times, only the first time
* will set the start time.
*/
public void start() {
if (!isStarted()) {
mStart = mClock.now();
}
mStarted = true;
}
/**
* Stop the time for this event. If the event haven't been started yet, the start and stop time
* will be the same.
*/
public void stop() {
if (isActive()) {
mStop = mClock.now();
} else if (!isStarted()) {
long now = mClock.now();
mStart = now;
mStop = now;
}
mStopped = true;
}
/**
* Get the relative duration of this event, this will subtract the duration of sub-events. If the
* event is still active, the duration up till this point in time is returned, else it's the
* duration from {@link #start()} till {@link #stop()}'
*
* @return The relative duration of this event
*/
public long getDuration() {
long delta = 0;
for (PageEvent e : getSubEvents()) {
delta += e.getDuration();
}
return getDurationAbsolute() - delta;
}
/**
* Get the absolute duration of this event, this does not subtract duration of sub-events. If the
* event is still active, the duration up till this point in time is returned, else it's the
* duration from {@link #start()} till {@link #stop()}'
*
* @return The absolute duration of this event
*/
public long getDurationAbsolute() {
return (isActive() ? mClock.now() : mStop) - mStart;
}
/** @return {@code true} if the event has been started, but not yet stopped, else {@code false} */
public boolean isActive() {
return mStarted && !mStopped;
}
/** @return {@code true} if the event has been started, else {@code false} */
public boolean isStarted() {
return mStarted;
}
/** @return {@code true} if the event has been stopped, else {@code false} */
public boolean isStopped() {
return mStopped;
}
public void reset() {
mStarted = false;
mStopped = false;
mStart = 0;
mStop = 0;
for (PageEvent e : mSubEvents) {
e.reset();
}
mSubEvents.clear();
}
public EventType getType() {
return mEventType;
}
public String getViewSession() {
return mViewSession;
}
public int[] getPages() {
return mPages;
}
public long getStart() {
return mStart;
}
public long getStop() {
return mStop;
}
public Clock getClock() {
return mClock;
}
private Orientation getOrientation() {
return mOrientation;
}
public boolean isCollected() {
return mCollected;
}
public void setCollected(boolean collected) {
mCollected = collected;
}
public void addSubEvent(PageEvent e) {
mSubEvents.add(e);
}
public List<PageEvent> getSubEvents() {
return mSubEvents;
}
public List<PageEvent> getSubEventsRecursive() {
if (mSubEvents.isEmpty()) {
return mSubEvents;
}
ArrayList<PageEvent> tmp = new ArrayList<PageEvent>(mSubEvents);
for (PageEvent e : mSubEvents) {
tmp.addAll(e.getSubEventsRecursive());
}
return tmp;
}
@Override
public String toString() {
return "";
}
public JSONObject toDebugJSON() {
JSONObject o = toJSON();
try {
o.put("start", mStart);
o.put("stop", mStop);
o.put("clock", mClock.getClass().getSimpleName());
o.put("sub-event-count", mSubEvents.size());
o.put("durationAbs", getDurationAbsolute());
} catch (JSONException e) {
SgnLog.d(TAG, e.getMessage(), e);
}
return o;
}
public JSONObject toJSON() {
try {
JSONObject o = new JSONObject();
o.put("type", mEventType.toString());
o.put("ms", getDuration());
o.put("orientation", mOrientation.toString());
o.put("pages", PageflipUtils.join(",", mPages));
o.put("view_session", mViewSession);
return o;
} catch (JSONException e) {
SgnLog.d(TAG, e.getMessage(), e);
}
return new JSONObject();
}
}
public class MemoryCache implements Cache {
public static final String TAG = Constants.getTag(MemoryCache.class);
/** On average we've measured a Cache.Item from the ETA API to be around 4kb */
private static final int AVG_ITEM_SIZE = 4096;
/** Max cache size - init to 1mb */
private int mMaxItems = 256;
/** Perceent of cache to remove on cleanup */
private int mPercentToClean = 20;
private Map<String, Item> mCache;
public MemoryCache() {
setLimit(Runtime.getRuntime().maxMemory() / 8);
float loadFactor = 1.5f; // Quicker lookup times
boolean accessOrder = true; // Enable LRU ordering
mCache =
Collections.synchronizedMap(
new LinkedHashMap<String, Item>(mMaxItems, loadFactor, accessOrder));
}
/**
* Set the percentage of cache to clean out when memory limit is hit
*
* @param percentToClean A percentage between 0 and 100 (default is 20)
*/
public void setCleanLimit(int percentToClean) {
if (percentToClean <= 0 || 100 <= percentToClean) {
throw new IllegalArgumentException("Percent a number between 0-100");
}
mPercentToClean = percentToClean;
}
/**
* Set the limit on memory this Cache may use.
*
* @param maxMemLimit The limit in bytes
*/
public void setLimit(long maxMemLimit) {
if (maxMemLimit > Runtime.getRuntime().maxMemory()) {
throw new IllegalArgumentException("maxMemLimit cannot be more than max heap size");
}
mMaxItems = (int) (maxMemLimit / AVG_ITEM_SIZE);
SgnLog.v(
TAG, "New memory limit: " + maxMemLimit / 1024 + "kb (approx " + mMaxItems + " items)");
}
public void put(Request<?> request, Response<?> response) {
// If the request is cacheable
if (request.getMethod() == Method.GET
&& request.isCacheable()
&& !request.isCacheHit()
&& response.cache != null) {
request.addEvent("add-response-to-cache");
synchronized (MemoryCache.class) {
mCache.putAll(response.cache);
checkSize();
}
}
}
private void checkSize() {
int size = mCache.size();
if (size > mMaxItems) {
float percentToRemove = (float) mPercentToClean / (float) 100;
int itemsToRemove = (int) (size * percentToRemove);
// least recently accessed item will be the first one iterated
Iterator<Entry<String, Cache.Item>> it = mCache.entrySet().iterator();
while (it.hasNext()) {
it.next();
it.remove();
if (itemsToRemove-- == 0) {
break;
}
}
SgnLog.d(TAG, "Cleaned " + TAG + " new size: " + mCache.size());
}
}
public Cache.Item get(String key) {
synchronized (MemoryCache.class) {
Cache.Item c = mCache.get(key);
if (c == null) {
return null;
} else if (c.isExpired()) {
mCache.remove(key);
return null;
}
return c;
}
}
public void clear() {
synchronized (MemoryCache.class) {
mCache.clear();
}
}
}
