/**
* Push a cache entry value out onto the websocket channel (to the browser).
*
* @param key The cache entry key whose value is to be pushed to the browser.
* @param cache The cache containing the key.
* @param socket The channel context associated with the browser websocket channel..
*/
public static void pushCacheValue(
String key, Cache<Object, Object> cache, WebSocketChannel socket) {
Object value = cache.get(key);
JsonObject responseObject = toJSON(key, value, cache.getName());
// Write the JSON response out onto the channel...
WebSockets.sendText(responseObject.toString(), socket, null);
// socket. channel().writeAndFlush(new TextWebSocketFrame(responseObject.toString()));
}
/**
* Push a cache entry value out onto the websocket channel (to the browser).
*
* @param key The cache entry key whose value is to be pushed to the browser.
* @param cache The cache containing the key.
* @param ctx The channel context associated with the browser websocket channel..
*/
public static void pushCacheValue(
String key, Cache<Object, Object> cache, ChannelHandlerContext ctx) {
Object value = cache.get(key);
JsonObject responseObject = toJSON(key, value, cache.getName());
// Write the JSON response out onto the channel...
ctx.channel()
.writeAndFlush(
new TextWebSocketFrame(responseObject.toString()), ctx.channel().voidPromise());
}
private static JsonObject getJsonObject(Object value) {
JsonObject valueObject;
try {
valueObject = JsonObject.fromObject(value);
} catch (JsonConversionException e) {
throw logger.unableToGetFieldsFromObject(e);
}
return valueObject;
}
/**
* Cache key, value and cache-name to JSON string.
*
* <p>Note that value objects (like String, Numbers, Characters) are not being converted.
*
* @param key The cache key.
* @param value The cache value.
* @param cacheName The cache name.
* @return JSON Object representing a cache entry payload for transmission to the browser channel.
* @throws java.lang.IllegalStateException In case of complex object which can not be converted to
* JSON.
*/
public static JsonObject toJSON(String key, Object value, String cacheName) {
JsonObject jsonObject = JsonObject.createNew();
jsonObject.put(OpHandler.CACHE_NAME, cacheName);
jsonObject.put(OpHandler.KEY, key);
if (value != null) {
if (needsJsonConversion(value)) {
JsonObject valueObject = getJsonObject(value);
jsonObject.put(OpHandler.VALUE, valueObject.toString());
jsonObject.put(OpHandler.MIME, "application/json");
} else {
jsonObject.put(OpHandler.VALUE, value);
jsonObject.put(OpHandler.MIME, "text/plain");
}
} else {
jsonObject.put(OpHandler.VALUE, null);
}
return jsonObject;
}
public static void pushErrorMessage(String errorMessage, ChannelHandlerContext ctx) {
JsonObject errorObject = JsonObject.createNew();
errorObject.put(OpHandler.ERROR, errorMessage);
ctx.channel()
.writeAndFlush(new TextWebSocketFrame(errorObject.toString()), ctx.channel().voidPromise());
}
public JsonPayloadAssertion hasFields(String key, String value) {
assertTrue(assertedNode.containsKey(key));
assertEquals(value, assertedNode.get(key));
return this;
}
public JsonPayloadAssertion hasMimeType(String mimeType) {
assertEquals(mimeType, assertedNode.get(OpHandler.MIME));
return this;
}
public JsonPayloadAssertion hasValue(Object value) {
assertEquals(value, assertedNode.get(OpHandler.VALUE));
return this;
}
public JsonPayloadAssertion hasKey(String key) {
assertEquals(key, assertedNode.get(OpHandler.KEY));
return this;
}
public JsonPayloadAssertion hasCacheName(String cacheName) {
assertEquals(cacheName, assertedNode.get(OpHandler.CACHE_NAME));
return this;
}