Refactor: Introduce service layer and thin down controller layer

.gitignore

@@ -16,6 +16,7 @@
 *.swp
 *.swo
 *~
+.cursor/
 
 ### Logs ###
 *.log

src/main/java/org/phoebus/channelfinder/configuration/LegacyApiProperties.java

@@ -0,0 +1,47 @@
+package org.phoebus.channelfinder.configuration;
+
+import jakarta.annotation.PostConstruct;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+/**
+ * Configuration for the legacy ChannelFinder HTTP API path prefix.
+ *
+ * <p>The property {@code channelfinder.legacy.service-root} controls the first path segment of all
+ * legacy-API URLs (e.g. {@code ChannelFinder/resources/channels}). Multi-service deployments
+ * typically use different roots per service to distinguish paths at a shared reverse proxy.
+ *
+ * <p>The value is normalized on startup: leading and trailing slashes are stripped, and an empty or
+ * blank value reverts to the default {@code ChannelFinder}.
+ */
+@Component
+@ConfigurationProperties(prefix = "channelfinder.legacy")
+public class LegacyApiProperties {
+
+  static final String DEFAULT_ROOT = "ChannelFinder";
+
+  private String serviceRoot = DEFAULT_ROOT;
+
+  @PostConstruct
+  void normalize() {
+    if (serviceRoot == null || serviceRoot.isBlank()) {
+      serviceRoot = DEFAULT_ROOT;
+      return;
+    }
+    serviceRoot = serviceRoot.strip();
+    while (serviceRoot.startsWith("/")) serviceRoot = serviceRoot.substring(1);
+    while (serviceRoot.endsWith("/"))
+      serviceRoot = serviceRoot.substring(0, serviceRoot.length() - 1);
+    if (serviceRoot.isBlank()) {
+      serviceRoot = DEFAULT_ROOT;
+    }
+  }
+
+  public String getServiceRoot() {
+    return serviceRoot;
+  }
+
+  public void setServiceRoot(String serviceRoot) {
+    this.serviceRoot = serviceRoot;
+  }
+}

src/main/java/org/phoebus/channelfinder/configuration/PopulateDBConfiguration.java

@@ -179,7 +179,7 @@ public synchronized void cleanupDB() {
     }
   }
 
-  public synchronized void createDB(int cells) {
+  public synchronized void createDB(int cells) throws IOException {
     numberOfCells = cells;
     createDB();
   }
@@ -188,7 +188,7 @@ public Set<String> getChannelList() {
     return channelList;
   }
 
-  public synchronized void createDB() {
+  public synchronized void createDB() throws IOException {
     int freq = 25;
     Collection<Channel> channels = new ArrayList<>();
     createSRChannels(channels, freq);
@@ -221,35 +221,31 @@ public synchronized void createDB() {
     logger.log(Level.INFO, "completed populating");
   }
 
-  private void checkBulkResponse(BulkRequest.Builder br) {
+  private void checkBulkResponse(BulkRequest.Builder br) throws IOException {
+    BulkResponse results;
     try {
-      BulkResponse results = client.bulk(br.build());
-      if (results.errors()) {
-        logger.log(Level.SEVERE, "CreateDB Bulk had errors");
-        for (BulkResponseItem item : results.items()) {
-          if (item.error() != null) {
-            logger.log(Level.SEVERE, () -> item.error().reason());
-          }
+      results = client.bulk(br.build());
+    } catch (IOException e) {
+      throw new IOException("CreateDB bulk operation failed", e);
+    }
+    if (results.errors()) {
+      StringBuilder errors = new StringBuilder("CreateDB bulk had errors:");
+      for (BulkResponseItem item : results.items()) {
+        if (item.error() != null) {
+          errors.append("\n  ").append(item.error().reason());
         }
       }
-    } catch (IOException e) {
-      logger.log(Level.WARNING, "CreateDB Bulk operation failed.", e);
+      throw new IOException(errors.toString());
     }
   }
 
-  private void bulkInsertAllChannels(Collection<Channel> channels) {
-    try {
-      logger.info("Bulk inserting channels");
-
-      bulkInsertChannels(channels);
-      channels.clear();
-
-    } catch (Exception e) {
-      logger.log(Level.WARNING, e.getMessage(), e);
-    }
+  private void bulkInsertAllChannels(Collection<Channel> channels) throws IOException {
+    logger.info("Bulk inserting channels");
+    bulkInsertChannels(channels);
+    channels.clear();
   }
 
-  private void createBOChannels(Collection<Channel> channels, int freq) {
+  private void createBOChannels(Collection<Channel> channels, int freq) throws IOException {
     logger.info(() -> "Creating BO channels");
 
     for (int i = 1; i <= numberOfCells; i++) {
@@ -263,7 +259,7 @@ private void createBOChannels(Collection<Channel> channels, int freq) {
     }
   }
 
-  private void createSRChannels(Collection<Channel> channels, int freq) {
+  private void createSRChannels(Collection<Channel> channels, int freq) throws IOException {
     logger.info("Creating SR channels");
 
     for (int i = 1; i <= numberOfCells; i++) {
@@ -400,32 +396,43 @@ private Collection<Channel> insertSRCell(String cell) {
     return result;
   }
 
-  private void bulkInsertChannels(Collection<Channel> result) throws IOException {
-    long start = System.currentTimeMillis();
-    BulkRequest.Builder br = new BulkRequest.Builder();
-    for (Channel channel : result) {
-      br.operations(
-          op ->
-              op.index(
-                  IndexOperation.of(
-                      i ->
-                          i.index(esService.getES_CHANNEL_INDEX())
-                              .id(channel.getName())
-                              .document(channel))));
-    }
-    String prepare = "|Prepare: " + (System.currentTimeMillis() - start) + "|";
-    start = System.currentTimeMillis();
-    br.refresh(Refresh.True);
-
-    BulkResponse srResult = client.bulk(br.build());
-    String execute = "|Execute: " + (System.currentTimeMillis() - start) + "|";
-    logger.log(Level.INFO, () -> "Inserted cell " + prepare + " " + execute);
-    if (srResult.errors()) {
-      logger.log(Level.SEVERE, "Bulk insert had errors");
-      for (BulkResponseItem item : srResult.items()) {
-        if (item.error() != null) {
-          logger.log(Level.SEVERE, () -> item.error().reason());
+  private static final int BULK_INSERT_BATCH_SIZE = 1000;
+
+  private void bulkInsertChannels(Collection<Channel> channels) throws IOException {
+    List<Channel> list = new ArrayList<>(channels);
+    for (int offset = 0; offset < list.size(); offset += BULK_INSERT_BATCH_SIZE) {
+      List<Channel> batch =
+          list.subList(offset, Math.min(offset + BULK_INSERT_BATCH_SIZE, list.size()));
+      int batchCount = batch.size();
+      long t0 = System.currentTimeMillis();
+      BulkRequest.Builder br = new BulkRequest.Builder();
+      for (Channel channel : batch) {
+        br.operations(
+            op ->
+                op.index(
+                    IndexOperation.of(
+                        i ->
+                            i.index(esService.getES_CHANNEL_INDEX())
+                                .id(channel.getName())
+                                .document(channel))));
+      }
+      String prepare = "|Prepare: " + (System.currentTimeMillis() - t0) + "|";
+      t0 = System.currentTimeMillis();
+      br.refresh(Refresh.True);
+      BulkResponse result = client.bulk(br.build());
+      String execute = "|Execute: " + (System.currentTimeMillis() - t0) + "|";
+      logger.log(
+          Level.INFO,
+          () -> "Inserted batch (" + batchCount + " channels) " + prepare + " " + execute);
+      if (result.errors()) {
+        StringBuilder errors = new StringBuilder("Bulk insert batch had errors:");
+        for (BulkResponseItem item : result.items()) {
+          if (item.error() != null) {
+            errors.append("\n  ").append(item.error().reason());
+          }
         }
+        logger.log(Level.SEVERE, errors::toString);
+        throw new IOException(errors.toString());
       }
     }
   }

src/main/java/org/phoebus/channelfinder/configuration/WebSecurityConfig.java

@@ -27,22 +27,40 @@
 import org.springframework.security.ldap.userdetails.DefaultLdapAuthoritiesPopulator;
 import org.springframework.security.provisioning.InMemoryUserDetailsManager;
 import org.springframework.security.web.SecurityFilterChain;
+import org.springframework.web.cors.CorsConfiguration;
+import org.springframework.web.cors.CorsConfigurationSource;
+import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
 
 @Configuration
 public class WebSecurityConfig {
 
+  @Value("${cors.allowed-origins:*}")
+  private List<String> corsAllowedOrigins;
+
   @Bean
   public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
     // CSRF disabled: application is a stateless REST API using HTTP Basic auth.
     // No session or cookie-based authentication is used, so CSRF attacks are not applicable.
     return http.csrf(csrf -> csrf.disable())
+        .cors(cors -> cors.configurationSource(corsConfigurationSource()))
         .sessionManagement(
             session -> session.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
         .authorizeHttpRequests(auth -> auth.anyRequest().authenticated())
         .httpBasic(withDefaults())
         .build();
   }
 
+  @Bean
+  public CorsConfigurationSource corsConfigurationSource() {
+    CorsConfiguration config = new CorsConfiguration();
+    config.setAllowedOriginPatterns(corsAllowedOrigins);
+    config.setAllowedMethods(List.of("GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS"));
+    config.setAllowedHeaders(List.of("*"));
+    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
+    source.registerCorsConfiguration("/**", config);
+    return source;
+  }
+
   @Bean
   public WebSecurityCustomizer ignoringCustomizer() {
     // Authentication and Authorization is only needed for non search/query operations

src/main/java/org/phoebus/channelfinder/exceptions/ChannelNotFoundException.java

@@ -0,0 +1,8 @@
+package org.phoebus.channelfinder.exceptions;
+
+public class ChannelNotFoundException extends RuntimeException {
+
+  public ChannelNotFoundException(String channelName) {
+    super("Channel not found: " + channelName);
+  }
+}

src/main/java/org/phoebus/channelfinder/exceptions/ChannelValidationException.java

@@ -0,0 +1,8 @@
+package org.phoebus.channelfinder.exceptions;
+
+public class ChannelValidationException extends RuntimeException {
+
+  public ChannelValidationException(String message) {
+    super(message);
+  }
+}

src/main/java/org/phoebus/channelfinder/exceptions/PropertyNotFoundException.java

@@ -0,0 +1,8 @@
+package org.phoebus.channelfinder.exceptions;
+
+public class PropertyNotFoundException extends RuntimeException {
+
+  public PropertyNotFoundException(String propertyName) {
+    super("Property not found: " + propertyName);
+  }
+}

src/main/java/org/phoebus/channelfinder/exceptions/PropertyValidationException.java

@@ -0,0 +1,8 @@
+package org.phoebus.channelfinder.exceptions;
+
+public class PropertyValidationException extends RuntimeException {
+
+  public PropertyValidationException(String message) {
+    super(message);
+  }
+}

src/main/java/org/phoebus/channelfinder/exceptions/TagNotFoundException.java

@@ -0,0 +1,8 @@
+package org.phoebus.channelfinder.exceptions;
+
+public class TagNotFoundException extends RuntimeException {
+
+  public TagNotFoundException(String tagName) {
+    super("Tag not found: " + tagName);
+  }
+}

src/main/java/org/phoebus/channelfinder/exceptions/TagValidationException.java

@@ -0,0 +1,8 @@
+package org.phoebus.channelfinder.exceptions;
+
+public class TagValidationException extends RuntimeException {
+
+  public TagValidationException(String message) {
+    super(message);
+  }
+}

src/main/java/org/phoebus/channelfinder/exceptions/UnauthorizedException.java

@@ -0,0 +1,8 @@
+package org.phoebus.channelfinder.exceptions;
+
+public class UnauthorizedException extends RuntimeException {
+
+  public UnauthorizedException(String message) {
+    super(message);
+  }
+}