Chain Class — spring-boot Architecture

Source Code

core/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/WebProperties.java lines 160–350

		public static class Chain {

			boolean customized;

			/**
			 * Whether to enable the Spring Resource Handling chain. By default, disabled
			 * unless at least one strategy has been enabled.
			 */
			private @Nullable Boolean enabled;

			/**
			 * Whether to enable caching in the Resource chain.
			 */
			private boolean cache = true;

			/**
			 * Whether to enable resolution of already compressed resources (gzip,
			 * brotli). Checks for a resource name with the '.gz' or '.br' file
			 * extensions.
			 */
			private boolean compressed;

			private final Strategy strategy = new Strategy();

			/**
			 * Return whether the resource chain is enabled. Return {@code null} if no
			 * specific settings are present.
			 * @return whether the resource chain is enabled or {@code null} if no
			 * specified settings are present.
			 */
			public @Nullable Boolean getEnabled() {
				return getEnabled(getStrategy().getFixed().isEnabled(), getStrategy().getContent().isEnabled(),
						this.enabled);
			}

			private boolean hasBeenCustomized() {
				return this.customized || getStrategy().hasBeenCustomized();
			}

			public void setEnabled(Boolean enabled) {
				this.enabled = enabled;
				this.customized = true;
			}

			public boolean isCache() {
				return this.cache;
			}

			public void setCache(boolean cache) {
				this.cache = cache;
				this.customized = true;
			}

			public Strategy getStrategy() {
				return this.strategy;
			}

			public boolean isCompressed() {
				return this.compressed;
			}

			public void setCompressed(boolean compressed) {
				this.compressed = compressed;
				this.customized = true;
			}

			static @Nullable Boolean getEnabled(boolean fixedEnabled, boolean contentEnabled,
					@Nullable Boolean chainEnabled) {
				return (fixedEnabled || contentEnabled) ? Boolean.TRUE : chainEnabled;
			}

			/**
			 * Strategies for extracting and embedding a resource version in its URL path.
			 */
			public static class Strategy {

				private final Fixed fixed = new Fixed();

				private final Content content = new Content();

				public Fixed getFixed() {
					return this.fixed;
				}

				public Content getContent() {
					return this.content;
				}

				private boolean hasBeenCustomized() {
					return getFixed().hasBeenCustomized() || getContent().hasBeenCustomized();
				}

				/**
				 * Version Strategy based on content hashing.
				 */
				public static class Content {

					private boolean customized;

					/**
					 * Whether to enable the content Version Strategy.
					 */
					private boolean enabled;

					/**
					 * List of patterns to apply to the content Version Strategy.
					 */
					private String[] paths = new String[] { "/**" };

					public boolean isEnabled() {
						return this.enabled;
					}

					public void setEnabled(boolean enabled) {
						this.customized = true;
						this.enabled = enabled;
					}

					public String[] getPaths() {
						return this.paths;
					}

					public void setPaths(String[] paths) {
						this.customized = true;
						this.paths = paths;
					}

					private boolean hasBeenCustomized() {
						return this.customized;
					}

				}

				/**
				 * Version Strategy based on a fixed version string.
				 */
				public static class Fixed {

					private boolean customized;

					/**
					 * Whether to enable the fixed Version Strategy.
					 */
					private boolean enabled;

					/**
					 * List of patterns to apply to the fixed Version Strategy.
					 */
					private String[] paths = new String[] { "/**" };

					/**
					 * Version string to use for the fixed Version Strategy.
					 */
					private @Nullable String version;

					public boolean isEnabled() {
						return this.enabled;
					}

					public void setEnabled(boolean enabled) {
						this.customized = true;
						this.enabled = enabled;
					}

					public String[] getPaths() {
						return this.paths;
					}

					public void setPaths(String[] paths) {
						this.customized = true;
						this.paths = paths;
					}

					public @Nullable String getVersion() {
						return this.version;
					}

					public void setVersion(@Nullable String version) {
						this.customized = true;
						this.version = version;
					}

					private boolean hasBeenCustomized() {
						return this.customized;
					}

				}

			}

		}