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#590 add explanation for caching pattern (#1693)

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Co-authored-by: Subhrodip Mohanta <hello@subho.xyz>
This commit is contained in:
Ilkka Seppälä
2021-03-28 14:02:29 +03:00
committed by GitHub
parent 6d7084f18d
commit eb8f9db575
3 changed files with 319 additions and 9 deletions
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4
caching/src/main/java/com/iluwatar/caching/AppManager.java
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@ -25,6 +25,7 @@ package com.iluwatar.caching;
import java.text.ParseException;
import java.util.Optional;
import lombok.extern.slf4j.Slf4j;
/**
* AppManager helps to bridge the gap in communication between the main class and the application's
@ -33,6 +34,7 @@ import java.util.Optional;
* Depending on the chosen caching policy, AppManager will call the appropriate function in the
* CacheStore class.
*/
@Slf4j
public final class AppManager {
private static CachingPolicy cachingPolicy;
@ -50,7 +52,7 @@ public final class AppManager {
try {
DbManager.connect();
} catch (ParseException e) {
e.printStackTrace();
LOGGER.error("Error connecting to MongoDB", e);
}
} else {
DbManager.createVirtualDb();

10
caching/src/main/java/com/iluwatar/caching/DbManager.java
View File

@ -30,6 +30,7 @@ import com.mongodb.client.model.UpdateOptions;
import java.text.ParseException;
import java.util.HashMap;
import java.util.Map;
import lombok.extern.slf4j.Slf4j;
import org.bson.Document;
/**
@ -41,6 +42,7 @@ import org.bson.Document;
* underlying data storage (connect()) or a simple Java data structure to (temporarily) store the
* data/objects during runtime (createVirtualDB()).</p>
*/
@Slf4j
public final class DbManager {
private static MongoClient mongoClient;
@ -83,7 +85,7 @@ public final class DbManager {
try {
connect();
} catch (ParseException e) {
e.printStackTrace();
LOGGER.error("Error connecting to MongoDB", e);
}
}
var iterable = db
@ -110,7 +112,7 @@ public final class DbManager {
try {
connect();
} catch (ParseException e) {
e.printStackTrace();
LOGGER.error("Error connecting to MongoDB", e);
}
}
db.getCollection(CachingConstants.USER_ACCOUNT).insertOne(
@ -132,7 +134,7 @@ public final class DbManager {
try {
connect();
} catch (ParseException e) {
e.printStackTrace();
LOGGER.error("Error connecting to MongoDB", e);
}
}
db.getCollection(CachingConstants.USER_ACCOUNT).updateOne(
@ -153,7 +155,7 @@ public final class DbManager {
try {
connect();
} catch (ParseException e) {
e.printStackTrace();
LOGGER.error("Error connecting to MongoDB", e);
}
}
db.getCollection(CachingConstants.USER_ACCOUNT).updateOne(